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Anderson RS. A new species of Toxorhinus Lacordaire (Coleoptera: Curculionidae: Dryophthorinae; Rhynchophorini) from Ecuador. Zootaxa 2023; 5270:337-342. [PMID: 37518161 DOI: 10.11646/zootaxa.5270.2.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Indexed: 08/01/2023]
Abstract
Toxorhinus amarillo Anderson, new species (Coleoptera: Curculionidae: Dryophthorinae; Rhynchophorini), is here described from Ecuador (Cotopaxi, Biochoa Otonga). The species is compared to the other two species in the genus.
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Affiliation(s)
- Robert S Anderson
- Beaty Centre for Species Discovery; Research and Collections; Canadian Museum of Nature; 1740 Chemin Pink; Gatineau; Quebec; J9J 3N7; Canada.
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Whibley D, Macfarlane GJ, Anderson RS, Tang NK, Clauw DJ, Kratz AL. Move & Snooze: A Feasibility Study Of A Remotely Delivered Personalized Physical Activity Program Combined With Automated Digital Cognitive Behavioral Therapy For Insomnia For Adults With Osteoarthritis-Related Pain. The Journal of Pain 2023. [DOI: 10.1016/j.jpain.2023.02.303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
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Langor DW, Anderson RS, Bouchard P, Langor SD. New records of Curculionoidea from Newfoundland and Labrador, with the first records of Orthochaetessetiger ([Beck]) (Curculionidae, Curculioninae, Styphlini) for North America. Zookeys 2022; 1136:125-162. [PMID: 36762054 PMCID: PMC9836539 DOI: 10.3897/zookeys.1136.91567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 11/11/2022] [Indexed: 12/23/2022] Open
Abstract
Thirty species of Curculionoidea (28 Curculionidae and one each of Brentidae and Nemonychidae) are reported as new records from the Canadian province of Newfoundland and Labrador, most of them from the island of Newfoundland. As well, 13 species of Curculionidae and one of Brentidae previously recorded from Newfoundland are newly reported from Labrador, and one Curculionidae previously recorded from Labrador is newly reported from Newfoundland. The Palearctic species, Orthochaetessetiger ([Beck]), is herein reported as a new Canadian and North American record, with specimens documented from Newfoundland and British Columbia. Additions to the primary key for North American weevils are provided to help identify this genus among the North American fauna. Of the species of Curculionoidea previously recorded from the province in published literature, there is uncertain evidence for the occurrence of 14 species in the province as a whole or in the Labrador portion. Seven species are hereby removed from the faunal list for the province. One of those, Trachodeshispidus (Linnaeus), is also removed from the Canadian faunal list. The 134 species of Curculionoidea recorded from NL are listed and a brief synopsis of the fauna provided.
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Affiliation(s)
- David W. Langor
- Natural Resources Canada, Canadian Forest Service, 5320 – 122 St. NW, Edmonton, Alberta, T6H 3S5, CanadaNatural Resources CanadaEdmontonCanada
| | - Robert S. Anderson
- Canadian Museum of Nature, 1740 Chemin Pink, Gatineau, Quebec, J9J 3N7, CanadaCanadian Museum of NatureQuebecCanada
| | - Patrice Bouchard
- Canadian National Collection of Insects, Arachnids and Nematodes, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, Ontario, K1A 0C6, CanadaCanadian National Collection of Insects, Arachnids and Nematodes, Agriculture and Agri-Food CanadaOttawaCanada
| | - Stephen D. Langor
- University of Alberta, Department of Occupational Therapy, Corbett Hall, 8205 – 114 St. NW, Edmonton, Alberta, T6G 2G4, CanadaUniversity of AlbertaEdmontonCanada
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Fallon TS, Germann CA, Anderson RS, Strout TD. The research escape hunt: An escape room-scavenger hunt for resident education. AEM Educ Train 2022; 6:e10833. [PMID: 36562029 PMCID: PMC9764032 DOI: 10.1002/aet2.10833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 10/14/2022] [Accepted: 11/07/2022] [Indexed: 06/17/2023]
Abstract
Objectives Research and evidence-based medicine (EBM) education are important elements of emergency medicine (EM) residency training; however, curricular time is limited and integrating novel strategies to engage learners and improve understanding of complex concepts is challenging. We sought to develop a unique research escape hunt educational experience to teach EM residents basic research and EBM skills using an active-learning, team-based strategy. Methods A nine-station escape room-scavenger hunt was designed around educational content including (1) predictive statistics and diagnostic test characteristics, (2) interpretation of data and statistical analysis, (3) study design, (4) informed consent for research, and (5) the ethical principles guiding research. Stations required participants to use a variety of strategies to solve puzzles, with a correct response required to progress through the escape hunt. Teams worked together to solve each station's puzzles, with opportunities to reinforce the content in real time. Subsequent sessions were presented in a virtual format using Zoom breakout rooms over the past 2 years. Results Postactivity assessments were grounded in Kirkpatrick's model and focused on participants' reactions, learning, and behavior. Participants reported high levels of satisfaction (100% [21/21] "satisfied" or "extremely satisfied") and engagement (95% [20/21] "engaged" or "very engaged") with the activity, as well as increased comfort with the research and EBM concepts covered (91% [19/21] "agree" or "strongly agree" increased comfort), and demonstrated improvements in knowledge across each content area presented (91% [19/21]). Reflective Discussion This practical, team-based curriculum was found to be a successful way to engage residents with research methodology and EBM content. This curriculum is feasible for both in-person and virtual formats and we will continue to use this as a component of our EM residency program moving forward.
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Affiliation(s)
- Timothy S. Fallon
- Department of Emergency MedicineMaine Medical Center, Tufts University School of MedicinePortlandMaineUSA
| | - Carl A. Germann
- Department of Emergency MedicineMaine Medical Center, Tufts University School of MedicinePortlandMaineUSA
| | - Robert S. Anderson
- Department of Emergency MedicineMaine Medical Center, Tufts University School of MedicinePortlandMaineUSA
| | - Tania D. Strout
- Department of Emergency MedicineMaine Medical Center, Tufts University School of MedicinePortlandMaineUSA
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Lewis JH, Anderson RS. A revision of the North American genus Proctorus (Coleoptera, Curculionidae, Ellescini) with descriptions of two new species. Zookeys 2022; 1131:135-153. [PMID: 36761458 PMCID: PMC9836646 DOI: 10.3897/zookeys.1131.90392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 09/07/2022] [Indexed: 11/24/2022] Open
Abstract
The rarely collected North American endemic genus Proctorus (Coleoptera, Curculionidae, Ellescini) has hitherto contained two described species, P.armatus LeConte, 1876 and P.decipiens (LeConte, 1876). Here, Proctorus is revised and two new species, namely P.emarginatus sp. nov. and P.truncatus sp. nov., are described. Lectotypes for P.armatus and P.decipiens are designated from known syntypes. All four species in the genus are associated with Salicaceae, but, in addition to differences in external and genital morphology, there is also evidence of differing host plant usage between the species. A photographic key to the four species is provided to facilitate identification.
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Affiliation(s)
- Jake H. Lewis
- Environmental Science Section, Okinawa Institute of Science and Technology, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0495 JapanEnvironmental Science Section, Okinawa Institute of Science and TechnologyTanchaJapan,Department of Natural History, New Brunswick Museum, 277 Douglas Avenue, Saint John, New Brunswick, E2K 1E5 CanadaDepartment of Natural History, New Brunswick MuseumSaint JohnCanada
| | - Robert S. Anderson
- Beaty Centre for Species Discovery, Canadian Museum of Nature, 1740 Chemin Pink, Gatineau, Quebec, J9J 3N7 CanadaBeaty Centre for Species Discovery, Canadian Museum of NatureQuebecCanada
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Anderson RS. A new species of eyeless Lymantes Schoenherr (Coleoptera: Curculionidae: Molytinae: Lymantini) from Texas caves. Zootaxa 2022; 5087:383-388. [PMID: 35390911 DOI: 10.11646/zootaxa.5087.2.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Indexed: 11/04/2022]
Abstract
A new eyeless cave-inhabiting species of the weevil genus Lymantes Schoenherr (Coleoptera: Curculionidae: Molytinae: Lymantini) is described. Lymantes reddelli Anderson, new species, occurs in caves in Bexar and Travis Counties, Texas, United States of America. The new species is very similar to Lymantes nadineae Anderson but is found in caves south of the Colorado River whereas L. nadineae is only known from caves north of the Colorado River. Characters of external morphology and male genitalia to separate the species are given.
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Affiliation(s)
- Robert S Anderson
- Beaty Centre for Species Discovery, Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, ON. K1P 6P4 Canada. .
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Anderson RS. Conotrachelus terryerwini, a majestic new species of Curculionidae (Molytinae, Conotrachelini) from Costa Rica. Zookeys 2021; 1044:721-727. [PMID: 34183889 PMCID: PMC8222250 DOI: 10.3897/zookeys.1044.62722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 01/14/2021] [Indexed: 12/03/2022] Open
Abstract
A very large, new, and distinctive species of Conotrachelus Dejean is described from Área de Conservación Guanacaste, Costa Rica. Conotrachelusterryerwinisp. nov. (type locality Volcan Orosi, Estación Biológica Maritza, Guanacaste, Costa Rica) is described and named in honor of Terry L. Erwin (1940–2020), famed carabidologist and biodiversity champion. This majestic species is easily distinguished by its large body size (15–20 mm) and extremely long rostrum (especially in females).
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Affiliation(s)
- Robert S Anderson
- Beaty Centre for Species Discovery, Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, ON. K1P 6P4 Canada Canadian Museum of Nature Ottawa Canada
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Anderson RS. Two new species of Metamasius Horn, 1873 (Coleoptera: Curculionidae: Dryophthorinae) from Ecuador and Colombia. Zootaxa 2021; 4966:596600. [PMID: 34186587 DOI: 10.11646/zootaxa.4966.5.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Indexed: 11/04/2022]
Abstract
Two new species of South American Metamasius Horn (Coleoptera: Curculionidae: Dryophthorinae) are described: Metamasius onorei new species from Cotopaxi, Ecuador and Metamasius pilirostris new species from west of Río Yurumangui, Colombia. Diagnostic characters and images are provided for both new species to facilitate identification.
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Affiliation(s)
- Robert S Anderson
- Beaty Centre for Species Discovery, Research and Collections, Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, ON. Canada K1P 6P4..
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Anderson RS, Magidson PD, Khoujah D. Emergencies in the Older Adult. Emerg Med Clin North Am 2021. [DOI: 10.1016/s0733-8627(21)00026-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Grebennikov VV, Anderson RS. Late Miocene eastwards transatlantic dispersal of flightless anchonine weevils (Coleoptera: Curculionidae: Molytinae). Zootaxa 2021; 4952:zootaxa.4952.1.3. [PMID: 33903378 DOI: 10.11646/zootaxa.4952.1.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Indexed: 11/04/2022]
Abstract
The weevil genera Aethiopacorep Voisin and Titilayo Cristóvão Lyal are the only native African members of the nearly pantropical and poorly known tribe Anchonini. All Anchonini are flightless, a trait likely limiting dispersal, yet these weevils are found on both sides of the Atlantic Ocean. A phylogenetic analysis of 79 terminals and 3248 aligned positions from one mitochondrial and two nuclear ribosomal fragments supports a clade of West African Anchonini nested within American Anchonini. As suggested by previous authors, the Asian genera Himalanchonus Zherikhin and Otibazo Morimoto do not form a clade with the tribe's core, and along with Cycloterinus Kolbe, Euthycodes Pascoe, Leptanchonus Morimoto, Nepalanchonus Zherikhin, and Tanyomus Champion, are here removed from Anchonini and placed as Molytinae incertae sedis. So defined, the monophyletic tribe Anchonini contains 36 genus-group names, all but two denoting American taxa. Using molecular clock analysis, we estimate the separation of the West African Anchonini from its American sister at 9.5-5.2 million years ago (Ma). This date greatly postdates the Cretaceous opening of the Atlantic Ocean (about 100 Ma) and, therefore, evokes a single transatlantic dispersal to West Africa, likely by over-water rafting, leading to subsequent diversification. We postulate this to be the first documented eastwards crossing of the Atlantic Ocean by terrestrial non-volant arthropods based on morphological and molecular data.
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Affiliation(s)
- Vasily V Grebennikov
- Canadian Food Inspection Agency, 960 Carling Ave., Ottawa, ON, K1A 0Y9, Canada..
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Pontius EA, Anderson RS. Physical Therapy, Occupational Therapy, and Speech Language Pathology in the Emergency Department: Specialty Consult Services to Enhance the Care of Older Adults. Emerg Med Clin North Am 2021; 39:419-427. [PMID: 33863469 DOI: 10.1016/j.emc.2021.01.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The rehab services of Physical Therapy, Occupational Therapy, and Speech Language Pathology (PT/OT/SLP) are areas of emerging practice in the emergency department (ED). These specialty consult services can provide ED physicians with valuable, nuanced assessments for the older adults that will assist in determining a safe discharge plan. PT and OT interventions in the ED have been shown to decrease hospital admissions and readmissions, increase patient satisfaction, and decrease cost. Rehab specialists provide physicians with an expanded scope of management options that can greatly enhance the care of patients in the ED.
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Webster RP, de Tonnancour P, Sweeney JD, Webster VL, Kostanowicz CA, Hughes C, Anderson RS, Klymko J, Chantal C, Vigneault R. New Coleoptera records from eastern Canada, with additions to the fauna of Manitoba, British Columbia, and Yukon Territory. Zookeys 2020; 946:53-112. [PMID: 32728341 PMCID: PMC7358253 DOI: 10.3897/zookeys.946.52489] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 05/12/2020] [Indexed: 11/30/2022] Open
Abstract
One-hundred-eleven new provincial and territorial Coleoptera records are reported from New Brunswick (64), Nova Scotia (20), Prince Edward Island (5), Quebec (14), Manitoba (3), British Columbia (3), and Yukon Territory (2) for the 26 following families: Carabidae, Dytiscidae, Histeridae, Staphylinidae, Scarabaeidae, Buprestidae, Eucnemidae, Elateridae, Cantharidae, Erotylidae, Monotomidae, Cryptophagidae, Passandridae (first record of this family from New Brunswick), Laemophloeidae, Nitidulidae, Anamorphidae, Coccinellidae, Latridiidae, Mordellidae, Tenebrionidae, Cerambycidae, Chrysomelidae, Anthribidae, Brentidae, Dryophthoridae, and Curculionidae. Among these are ten new Canadian records: Heterosternuta oppositus (Say, 1823) (Dytiscidae) (New Brunswick), Gyrophaena blatchleyi Seevers, 1951 (Staphylinidae) (Quebec), Acropteroxys lecontei Crotch, 1873 (Erotylidae) (Manitoba), Placonotus falinorum Thomas, 2011 (Laemophloeidae) (Quebec), Adelina pallida (Say, 1824) (Tenebrionidae) (Quebec), Poecilocera harrisii (J.L. LeConte, 1851) (Chrysomelidae) (New Brunswick), Plesiobaris albilata (LeConte, 1876) (Curculionidae) (Quebec, New Brunswick), Pseudopityophthorus asperulus (LeConte, 1868) (Curculionidae) (Nova Scotia), Hylurgops palliatus (Gyllenhal, 1813) (Curculionidae) (New Brunswick), and Heteroborips seriatus (Blandford, 1894) (Curculionidae) (Nova Scotia). Plesiobaris disjuncta Casey reported as new for Canada in New Brunswick and Quebec by Webster et al. (2012a) is actually P. albilata (LeConte) and thus P. disjuncta is removed from the faunal list of Canada. Eleven species from New Brunswick not previously reported in literature were found on the online platforms BugGuide.Net and iNaturalist and are reported in this publication. This highlights the importance of online platforms dedicated to recording wildlife observations and citizen science in detecting new species records. Data is also presented for seven species from Quebec and two species from New Brunswick reported by Bousquet et al. (2013) without any supporting information for their occurrence in these provinces. Among the species reported here, 32 are adventive.
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Affiliation(s)
- Reginald P. Webster
- 24 Mill Stream Dr., Charters Settlement, New Brunswick, E3C 1X1, CanadaUnaffiliatedCharters SettlementCanada
| | - Pierre de Tonnancour
- 22, 5e avenue, Terrasse-Vaudreuil, Quebec, J7V 3P5, CanadaUnaffiliatedTerrasse-VaudreuilCanada
| | - Jon D. Sweeney
- Natural Resources Canada, Canadian Forest Service, Atlantic Forestry Centre, 1350 Regent St., Fredericton, New Brunswick, E3B 5P7, CanadaNatural Resources CanadaFrederictonCanada
| | - Vincent L. Webster
- Natural Resources Canada, Canadian Forest Service, Atlantic Forestry Centre, 1350 Regent St., Fredericton, New Brunswick, E3B 5P7, CanadaNatural Resources CanadaFrederictonCanada
| | - Chantelle A. Kostanowicz
- Natural Resources Canada, Canadian Forest Service, Atlantic Forestry Centre, 1350 Regent St., Fredericton, New Brunswick, E3B 5P7, CanadaNatural Resources CanadaFrederictonCanada
| | - Cory Hughes
- Natural Resources Canada, Canadian Forest Service, Atlantic Forestry Centre, 1350 Regent St., Fredericton, New Brunswick, E3B 5P7, CanadaNatural Resources CanadaFrederictonCanada
| | - Robert S. Anderson
- Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, Ontario, K1P 6P4, CanadaCanadian Museum of NatureOttawaCanada
| | - John Klymko
- Atlantic Canada Conservation Data Centre, P.O. Box 6416, Sackville, New Brunswick, E4L 4G7, CanadaAtlantic Canada Conservation DataSackvilleCanada
| | - Claude Chantal
- 302, rue Gabrielle-Roy, Varennes, Quebec, J3X 1L8, CanadaUnaffiliatedVarennesCanada
| | - Robert Vigneault
- 16, rue du Mont-Saint-Pierre, Oka, Quebec, J0N 1E0, CanadaUnaffiliatedOkaCanada
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Pendleton SL, Miller GH, Lifton N, Lehman SJ, Southon J, Crump SE, Anderson RS. Rapidly receding Arctic Canada glaciers revealing landscapes continuously ice-covered for more than 40,000 years. Nat Commun 2019; 10:445. [PMID: 30683866 PMCID: PMC6347664 DOI: 10.1038/s41467-019-08307-w] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 12/21/2018] [Indexed: 12/03/2022] Open
Abstract
Arctic temperatures are increasing faster than the Northern Hemisphere average due to strong positive feedbacks unique to polar regions. However, the degree to which recent Arctic warming is unprecedented remains debated. Ages of entombed plants in growth position preserved by now receding ice caps in Arctic Canada help to address this issue by placing recent conditions in a multi-millennial context. Here we show that pre-Holocene radiocarbon dates on plants collected at the margins of 30 ice caps in Arctic Canada suggest those locations were continuously ice covered for > 40 kyr, but are now ice-free. We use in situ 14C inventories in rocks from nine locations to explore the possibility of brief exposure during the warm early Holocene. Modeling the evolution of in situ 14C confirms that Holocene exposure is unlikely at all but one of the sites. Viewed in the context of temperature records from Greenland ice cores, our results suggest that summer warmth of the past century exceeds now any century in ~115,000 years. Shrinking Arctic Canada ice caps are revealing preserved landscapes containing a record of past glacier activity. Here the authors show that 14C ages of plants and cosmogenic 14C concentrations from these landscapes indicate that recently exposed landscapes have been continuously ice covered for > 40,000 years.
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Affiliation(s)
- Simon L Pendleton
- INSTAAR and Department of Geological Sciences, University of Colorado, Boulder, CO, 80309-0450, USA.
| | - Gifford H Miller
- INSTAAR and Department of Geological Sciences, University of Colorado, Boulder, CO, 80309-0450, USA
| | - Nathaniel Lifton
- Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN, 47907, USA.,Department of Physics and Astronomy, PRIME Lab, Purdue University, West Lafayette, IN, 47907, USA
| | - Scott J Lehman
- INSTAAR and Department of Geological Sciences, University of Colorado, Boulder, CO, 80309-0450, USA
| | - John Southon
- Department of Earth System Science, University of California, Irvine, Croul Hall, Irvine, CA, 92697-3100, USA
| | - Sarah E Crump
- INSTAAR and Department of Geological Sciences, University of Colorado, Boulder, CO, 80309-0450, USA
| | - Robert S Anderson
- INSTAAR and Department of Geological Sciences, University of Colorado, Boulder, CO, 80309-0450, USA
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Wickert AD, Anderson RS, Mitrovica JX, Naylor S, Carson EC. The Mississippi River records glacial-isostatic deformation of North America. Sci Adv 2019; 5:eaav2366. [PMID: 30729164 PMCID: PMC6353627 DOI: 10.1126/sciadv.aav2366] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 12/13/2018] [Indexed: 06/09/2023]
Abstract
The imprint of glacial isostatic adjustment has long been recognized in shoreline elevations of oceans and proglacial lakes, but to date, its signature has not been identified in river long profiles. Here, we reveal that the buried bedrock valley floor of the upper Mississippi River exhibits a 110-m-deep, 300-km-long overdeepening that we interpret to be a partial cast of the Laurentide Ice Sheet forebulge, the ring of flexurally raised lithosphere surrounding the ice sheet. Incision through this forebulge occurred during a single glacial cycle at some time between 2.5 and 0.8 million years before present, when ice-sheet advance forced former St. Lawrence River tributaries in Minnesota and Wisconsin to flow southward. This integrated for the first time the modern Mississippi River, permanently changing continental-scale hydrology and carving a bedrock valley through the migrating forebulge with sediment-poor water. The shape of the inferred forebulge is consistent with an ice sheet ~1 km thick near its margins, similar to the Laurentide Ice Sheet at the Last Glacial Maximum, and provides evidence of the impact of geodynamic processes on geomorphology even in the midst of a stable craton.
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Affiliation(s)
- Andrew D. Wickert
- Department of Earth Sciences and Saint Anthony Falls Laboratory, University of Minnesota, 116 Church St. SE, Minneapolis, MN 55455, USA
| | - Robert S. Anderson
- Institute of Arctic and Alpine Research and Department of Geological Sciences, University of Colorado, 4001 Discovery Dr., Boulder, CO 80303, USA
| | - Jerry X. Mitrovica
- Department of Earth and Planetary Sciences, Harvard University, 20 Oxford St., Cambridge, MA 02138, USA
| | - Shawn Naylor
- Center for Geospatial Data Analysis and Indiana Geological Survey, Indiana University, 611 N. Walnut Grove St., Bloomington, IN 47405, USA
| | - Eric C. Carson
- Wisconsin Geological and Natural History Survey, 3817 Mineral Point Rd., Madison, WI 53705, USA
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Anderson RS, Caterino MS. A revision of the genus Eurhoptus LeConte, 1876 (Curculionidae, Cryptorhynchinae) of America north of Mexico. Zookeys 2018:37-80. [PMID: 30310355 PMCID: PMC6177525 DOI: 10.3897/zookeys.787.26948] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 08/05/2018] [Indexed: 11/18/2022] Open
Abstract
The genus Eurhoptus LeConte, 1876 is revised for America north of Mexico. Eight species are recognized including E.pyriformis LeConte, 1876, E.sordidus (LeConte, 1876), E.curtus (Hamilton, 1893), resurrected name, and five new species as follows: E.rileyi new species (type locality, Texas, Hidalgo County, Bentsen Rio Grande State Park), E.imbricatus new species (type locality, Texas, Bandera County, Lost Maples State Natural Area), E.cariniventris new species (type locality, Texas, Bandera County, Lost Maples State Natural Area), E.occidentalis new species (type locality, Texas, Brewster County, Big Bend National Park), and E.aenigmaticus new species (type locality, Alabama, Winston County, Bankhead National Forest). Descriptions or redescriptions, and images of taxonomically important structures are presented for all species. A key to the eight species is included.
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Affiliation(s)
- Robert S Anderson
- Beaty Centre for Species Discovery, Research and Collection Division, Canadian Museum of Nature, PO Box 3443, Station D, Ottawa, ON. K1P 6P4, Canada Canadian Museum of Nature Ottawa Canada
| | - Michael S Caterino
- John and Suzanne Morse Chair of Arthropod Biodiversity, Department of Plant and Environmental Sciences, 277 Poole Agricultural Center, Clemson University, Clemson, SC 29634-0310, USA Clemson University Clemson United States of America
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Abstract
The genus Sicoderus Vanin is revised for the West Indies. A total of 32 species are known with 18 new species described herein as follows: Sicoderus aeneus (Haiti), S. alternatus (Dominican Republic), S. bautistai (Dominican Republic, Haiti), S. beatyi (Cuba), S. bipunctiventris (Cuba), S. caladeler (Cuba), S. detonnancouri (Dominican Republic), S. franzi (Puerto Rico), S. guanyangi (Dominican Republic), S. humeralis (Dominican Republic), S. lucidus (Dominica), S. medranae (Dominican Republic, Haiti), S. perezi (Dominican Republic), S. pseudostriatolateralis (Dominican Republic, Haiti), S. striatolateralis (Dominican Republic), S. thomasi (Haiti), S. turnbowi (Dominican Republic), and S. woodruffi (Grenada). All species are described or redescribed, natural history information is summarized and a listing of locality data from all specimens examined is included. A key is provided to all West Indian species of the genus. All species distributions are mapped and all (excepting S. propinquus Vanin) are represented by habitus images and images of male genitalia.
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Affiliation(s)
- Robert S Anderson
- Director, Beaty Centre for Species Discovery, Research and Collection Division, Canadian Museum of Nature. PO Box 3443, Station D, Ottawa, ON. K1P 6P4, Canada..
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17
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Anderson RS. Purealusbeckelorum, a new genus and species of cleonine weevil from western Texas and eastern New Mexico (Coleoptera, Curculionidae, Lixinae, Cleonini). Zookeys 2018:1-10. [PMID: 30271240 PMCID: PMC6160826 DOI: 10.3897/zookeys.785.26674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 07/31/2018] [Indexed: 11/16/2022] Open
Abstract
The new genus Purealus Anderson (type species, Purealusbeckelorumgen n. et sp. n., type locality: McKenzie Lake, Gaines County, Texas) is described to accommodate a new species of cleonine weevil from western Texas and eastern New Mexico. Habitus images and images of taxonomically significant structures are presented. Purealus appears to be unique within Cleonini in the distinctly tumescent and asperate base of elytral interval 3, and widely separated procoxae, two characters apparently not shared with any other world Cleonini. The species cannot be placed in either Apleurus or Scaphomorphus due to a combination of characters in part shared by each genus and the lack of characters used to define the monophyly of each genus. Coding of the character states and addition to the analysis presented in a recent comprehensive analysis of world Cleonini did not provide any significant information on phylogenetic affinities. No information on plant associations is available; most specimens have been collected walking on the ground in winter months in arid habitats.
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Affiliation(s)
- Robert S Anderson
- Beaty Centre for Species Discovery, Canadian Museum of Nature, PO Box 3443, Station D, Ottawa, ON. K1P 6P4, Canada Canadian Museum of Nature Ottawa Canada
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18
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de Tonnancour P, Anderson RS, Bouchard P, Chantal C, Dumont S, Vigneault R. New Curculionoidea (Coleoptera) records for Quebec, Canada. Zookeys 2017:95-117. [PMID: 28769721 PMCID: PMC5523881 DOI: 10.3897/zookeys.681.12469] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 05/17/2017] [Indexed: 11/12/2022] Open
Abstract
The following species of Curculionoidea are newly recorded from the Canadian province of Quebec: Coelocephalapionemaciipes (Fall, 1898); Ischnopterapionvirens (Herbst, 1797); Omphalapionhookerorum (Kirby, 1808); Perapionpunctinasum (J.B. Smith, 1884) (all Brentidae); Anthonomusrobustulus LeConte, 1876; Pseudanthonomushelvolus (Boheman, 1843); Bagousmagister LeConte, 1876; Bagoustanneri O’Brien, 1979; Buchananiusstriatus (LeConte, 1876); Ceutorhynchusbolteri Dietz, 1896; Ceutorhynchuspallidactylus (Marsham, 1802); Ceutorhynchuspauxillus Dietz, 1896; Conotrachelusbuchanani Schoof, 1942; Conotracheluspusillus LeConte, 1878; Conotrachelusrecessus (Casey, 1910); Curculiorubidus (Gyllenhal, 1835); Cylindrocopturuslongulus (LeConte, 1876); Hadroplontuslitura (Fabricius, 1775); Hyperarumicis (Linnaeus, 1758); Lixusterminalis LeConte, 1876; Myosidesseriehispidus Roelofs, 1873; Phloeotribusdentifrons (Blackman, 1921); Plocamusechidna (LeConte, 1876); Scolytusmuticus Say, 1824; Sirocalodessericans (LeConte, 1876); Smicronyxsculpticollis Casey, 1892 (all Curculionidae). Among these, Buchananiusstriatus, Conotrachelusbuchanani, Conotracheluspusillus, and Curculiorubidus (all Curculionidae) are also recorded from Canada for the first time. The latter is also newly reported from Ontario. Collecting data are provided for Lixuspunctinasus LeConte, 1876, previously reported to occur in Canada without any further information, and for Choragussayi LeConte, 1876 (Anthribidae) and Rhyssomatusaequalis Horn, 1873 (Curculionidae), both previously recorded from Quebec, also without further details.
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Affiliation(s)
| | - Robert S Anderson
- Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, Ontario, Canada, K1P 6P4
| | - Patrice Bouchard
- Canadian National Collection of Insects, Arachnids and Nematodes, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, Ontario, Canada, K1A 0C6
| | | | - Stéphane Dumont
- Département de biologie et de biotechnologies, Collège Ahuntsic, 9155 rue Saint-Hubert, Montréal, Quebec, Canada, H2M 1Y8
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19
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Anderson RS, Zhang G. The genus Apodrosus Marshall, 1922 in Cuba (Coleoptera, Curculionidae, Entiminae, Polydrusini). Zookeys 2017; 679:77-105. [PMID: 28769710 PMCID: PMC5523398 DOI: 10.3897/zookeys.679.12805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 05/16/2017] [Indexed: 11/17/2022] Open
Abstract
The genus Apodrosus Marshall is newly recorded for, and revised for Cuba. Nine new species are recognized as follows: Apodrosus alberti (type locality, Granma, Parque Nacional Pico Turquino), A. alternatus (type locality, Guantánamo, El Yunque), A. franklyni (type locality, Cienfuegos, Parque Nacional Pico San Juan), A. griseus (type locality, Santiago de Cuba, Siboney-Jutici Ecological Reserve), A. mensurensis (type locality, Holguin, Parque Nacional La Mensura-Piloto), A. pseudoalternatus (type locality, Matanzas, Varahicacos), A. beckeli (type locality, Guantánamo, 8 km W. Imias), A. sandersoni (type locality, Guantánamo, Loma Lafarola), and A. zayasi (type locality, Cienfuegos, Parque Nacional Pico San Juan). A key for their identification, descriptions, summaries of natural history information and data on distributions are presented. A molecular phylogeny based on 11 species of Apodrosus from Cuba, Hispaniola and Puerto Rico is reconstructed. A sister group relationship between Polydrusus and Apodrosus is recovered with a limited sampling of the former genus. The monophyly of Apodrosus is recovered with strong support. Cuban Apodrosus are not monophyletic. Five of the six sampled Cuban species form a clade, sister to an undescribed Apodrosus species from the Dominican Republic; and, Apodrosus alternatus is sister to A. quisqueyanus Girón & Franz, 2010, a species from the Dominican Republic. Biogeographic implications for Cuban species are discussed in light of the phylogeny.
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Affiliation(s)
- Robert S. Anderson
- Research and Collection Division, Canadian Museum of Nature, PO Box 3443, Station D, Ottawa, ON. K1P 6P4, Canada
| | - Guanyang Zhang
- School of Life Sciences, PO Box 874501, Arizona State University, Tempe, AZ. 85287, U.S.A.
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Enz R, Anderson RS. A Blown Pupil and Intracranial Hemorrhage in a 4-Week-Old: A Case of Delayed Onset Vitamin K Deficiency Bleeding, a Rare "Can't Miss" Diagnosis. J Emerg Med 2016; 51:164-7. [PMID: 27301668 DOI: 10.1016/j.jemermed.2015.06.089] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 06/05/2015] [Indexed: 11/25/2022]
Abstract
BACKGROUND Infants are at risk for vitamin K deficiency bleeding (VKDB) because of limited stores of vitamin K (VK) at birth and a low concentration of VK in human breast milk. Therefore, the administration of intramuscular (IM) VK at birth has been recommended since 1961 in the United States. Infants who do not receive IM VK and who are exclusively breast-fed are at increased risk for VKDB. While VKDB is rare, a common presentation of late onset VKDB is intracranial hemorrhage. CASE REPORT We report the case of a 4-week-old infant who presented to the emergency department with lethargy and a grossly dilated right pupil. The parents denied trauma. A computed tomography scan revealed a right-sided subdural hematoma with midline shift. The infant's international normalized ratio was >10.9 and his prothrombin time PT was >120 seconds. VK was administered and the child was transferred to a tertiary care center for emergent neurosurgery. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: The difficult part of making this critical diagnosis is considering it. Any bleeding in a newborn without trauma should prompt inquiry regarding neonatal VK administration and a serum prothrombin time level. Fortunately, once the diagnosis is made, therapy in the emergency department can be lifesaving and is familiar to emergency physicians. Treatment parallels usual care for the adult with excess anticoagulation caused by warfarin. Prompt intravenous VK is universally accepted. Studies to support fresh frozen plasma or prothrombin complex concentrate are lacking but make good clinical sense for life-threatening bleeding.
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Affiliation(s)
- Ryley Enz
- Department of Emergency Medicine, Maine Medical Center, Portland, Maine
| | - Robert S Anderson
- Department of Emergency Medicine, Maine Medical Center, Portland, Maine
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21
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Webster RP, Anderson RS, Webster VL, Alderson CA, Hughes CC, Sweeney JD. New Curculionoidea records from New Brunswick, Canada with an addition to the fauna of Nova Scotia. Zookeys 2016:367-86. [PMID: 27110173 PMCID: PMC4829932 DOI: 10.3897/zookeys.573.7444] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 01/11/2016] [Indexed: 11/12/2022] Open
Abstract
This paper presents 27 new records of Curculionoidea for the province of New Brunswick, Canada, including three species new to Canada, and 12 adventive species, as follows: Eusphryruswalshii LeConte, Choragusharrisii LeConte (newly recorded for Canada), Choraguszimmermanni LeConte (newly recorded for Canada) (Anthribidae); Cimberispallipennis (Blatchley) (Nemonychidae); Nanophyesmarmoratusmarmoratus (Goeze) (Brentidae); Procaslecontei Bedel (Brachyceridae); Anthonomuspusillus LeConte (newly recorded for Canada), Anthonomus (Cnemocyllus) pictus Blatchley, Archariussalicivorus (Paykull), Dorytomushirtus LeConte, Ellescusbipunctatus (Linnaeus), Mecinusjanthinus (Germar), Myrmexchevrolatii (Horn), Madarellusundulatus (Say), Microplontuscampestris (Gyllenhal), Pelenomuswaltoni (Boheman), Rhinoncusbruchoides (Herbst), Rhinoncusperpendicularis (Reich), Cossonusimpressifrons Boheman, Cossonuspacificus Van Dyke, Rhyncolusknowltoni (Thatcher), Eubulusbisignatus (Say), Polydrususcervinus (Linnaeus), Magdalispiceae Buchanan, Procryphalusmucronatus (LeConte), Ipsgrandicollis (Eichhoff), and Xyleborinusattenuatus (Blandford). Recent name changes in the genus Rhinoncus are applied to species known from New Brunswick. In addition, Orchestesalni (Linnaeus) is newly recorded from Nova Scotia.
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Affiliation(s)
| | - Robert S Anderson
- Research Division, Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, ON, Canada K1P 6P4
| | - Vincent L Webster
- Natural Resources Canada, Canadian Forest Service - Atlantic Forestry Centre, 1350 Regent St., P.O. Box 4000, Fredericton, NB, Canada E3B 5P7
| | - Chantelle A Alderson
- Natural Resources Canada, Canadian Forest Service - Atlantic Forestry Centre, 1350 Regent St., P.O. Box 4000, Fredericton, NB, Canada E3B 5P7
| | - Cory C Hughes
- Natural Resources Canada, Canadian Forest Service - Atlantic Forestry Centre, 1350 Regent St., P.O. Box 4000, Fredericton, NB, Canada E3B 5P7
| | - Jon D Sweeney
- Natural Resources Canada, Canadian Forest Service - Atlantic Forestry Centre, 1350 Regent St., P.O. Box 4000, Fredericton, NB, Canada E3B 5P7
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22
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Affiliation(s)
- Robert S Anderson
- Institute for Arctic and Alpine Research, University of Colorado, Boulder, CO 80303-0450, USA.
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23
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Luna-Cozar J, Anderson RS, Jones RW, León-Corté JL. A taxonomic monograph of the genus Tylodinus Champion (Coleoptera: Curculionidae: Cryptorhynchinae: Tylodina) of Chiapas, Mexico. Zootaxa 2014; 3788:1-63. [PMID: 24869746 DOI: 10.11646/zootaxa.3788.1.1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Indexed: 11/04/2022]
Abstract
The species of the genus Tylodinus from the Mexican state of Chiapas are revised. We examined 989 specimens representing 36 species; 23 species are grouped into eight species groups with 13 species considered as Incertae sedis. A total of 32 species are described as new and one species is a new record for México. Species groups (numbers of species in parentheses) and species are: Tylodinus buchanani species group (6) T. buchanani new species (type locality: Chiapas, Unión Juárez, Volcán Tacan), T. exiguus new species (type locality: Chiapas, Motozintla, 7 km SSW Motozintla de Mendoza), T. ixchel new species (type locality: Chiapas, Unión Juarez, Volcán Tacan), T. jonesi new species (type locality: Chiapas, Angel Albino Corzo, Reserva de la Biosfera el Triunfo, Campamento el Quetzal), T. variabilis new species (type locality: Chiapas, San Cristóbal de las Casas, Cerro Huitepec), T. wibmeri new species (type locality: Chiapas, Motozintla, 7 km SSW Motozintla de Mendoza); Tylodinus canaliculatus species group (3) T. canaliculatus Champion (Chiapas, Unión Juárez, Volcán Tacan, new record for México), T. sepulturaensis new species (Type locality: Chiapas, Villa Corzo, Ejido Sierra Morena), T. triumforium new species (Type locality: Chiapas, La Concordia, 4 km SE Custepec); Tylodinus cavicrus species group (3) T. cavicrus Champion, T. pseudocavicrus new species (type locality: Chiapas, San Cristóbal de las Casas, Cerro Huitepec), T. rugosus new species (type locality: Chiapas, Villa Flores, Sierra Morena); Tylodinus coapillensis species group (2) T. coapillensis new species (type locality: Chiapas, Coapilla, ca. 10.5 km NE Coapilla), T. leoncortesi new species (type locality: Chiapas, Pueblo Nuevo Solistahuacán, La Yerbabuena); Tylodinus mutabilis species group (2) Tylodinus mutabilis new species (type locality: Chiapas, Villa Corzo, Ejido Sierra Morena), T. parvus new species (type locality: Chiapas, Trinitaria, Lagunas de Montebello); Tylodinus nodulosus species group (3) T. andersoni new species (Chiapas, Ángel Albino Corzo, Reserva El Triunfo, Polígono 1), T. nodulosus (Boheman), T. zilchi Kuschel; Tylodinus pusillus species group (2) T. porvenirensis new species (type locality: Chiapas, El Porvenir, El Porvenir (2 km NE)), T. pusillus new species (type locality: Chiapas, 4 km SE Custepec); Tylodinus spiniventris species group (2) T. lum new species (Chiapas, San Cristóbal de las Casas, Cerro Huitepec), and T. spiniventris new species (type locality: Chiapas, San Cristóbal de las Casas, Reserva Huitepec); Incertae sedis (13) T. pinguis new species (type locality: Chiapas, Ángel Albino Corzo, Reserva El Triunfo, Polígono 1) , T. kissingeri new species (type locality: Chiapas, Tapalapa, ca. 14 km NE Coapilla), T. complicatus new species (type locality: Chiapas, Pueblo Nuevo Solistahuacán, La Yerbabuena), T. dominicus new species (type locality: Chiapas, Villa Corzo, Reserva de la Biósfera La Sepultura), T. noctis new species (type locality: Chiapas, Coapilla, ca. 10.5 km NE Coapilla), T. rufus new species (type locality: Chiapas, San Cristóbal de las Casas, Cerro Huitepec); T. branstetteri new species (type locality: Chiapas, La Concordia, 4 km SE Custepec), T. kuscheli new species (type locality: Chiapas, Villa Flores, Ejido Sierra Morena), T. pappi new species (type locality: Chiapas, Unión Juárez, Volcán Tacan), T. gibbosus new species (type locality: Chiapas, Pueblo Nuevo Solistahuacán, Yerbabuena Reserve), T. immundus new species (type locality: Chiapas, San Cristóbal de las Casas Cerro Huitepec), T. intzin new species (type locality: Chiapas, Tenejapa, Yashanal), T. elongatus new species (type locality: Chiapas, Ángel Albino Corzo, Reserva El Triunfo, Polígono 1). Three species (T. nodulosus (Boheman), T. zilchi Kuschel and T. cavicrus Champion) are not known to occur in Chiapas but were included in this study to be more representative of inter- and intraspecific variation and to provide a better definition of the taxonomic limits of species and species groups. Species groups are characterized and taxonomic composition and general distribution and ecological correlates summarized. Diagnoses and distributions are given for all species and ecological information is presented where available. Immature stages, life history and food habits are not known for any of the species.
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Affiliation(s)
- Jesús Luna-Cozar
- El Colegio de la Frontera Sur, Carretera Panamericana y Periférico Sur s/n, Barrio Ma. Auxiliadora, San Cristóbal de las Casas, Chiapas, México. C.P. 29290.; unknown
| | - Robert S Anderson
- Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, ON. Canada K1P 6P4.;
| | - Robert W Jones
- Facultad de Ciencias Naturales, Universidad Autónoma de Querétaro, Avenida de las Ciencias, s/n, Juriquilla, Querétaro, México. C.P. 76230.; unknown
| | - Jorge L León-Corté
- El Colegio de la Frontera Sur, Carretera Panamericana y Periférico Sur s/n, Barrio Ma. Auxiliadora, San Cristóbal de las Casas, Chiapas, México. C.P. 29290.; unknown
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Anderson RS. Two new species of Dryophthorinae in the genera Metamasius and Melchus from the Lesser Antilles (Coleoptera: urculionidae). Zootaxa 2013; 3750:396-400. [PMID: 25113709 DOI: 10.11646/zootaxa.3750.4.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Indexed: 11/04/2022]
Abstract
Metamasius planatus and Melchus jessae, are described and illustrated from the Lesser Antilles islands of Dominica and St. Lucia. Metamasius planatus (Dominica) is distinguished by a relatively flat profile and presence of dense, very fine, golden micropilosity covering most of the dorsal surface. Melchus jessae (Dominica and St. Lucia) is the sixth species known in the genus and is distinguished by the cylindrical rostrum (not laterally compressed apically). Information on natural history for both species is limited: some Metamasius planatus and one Melchus jessae were collected in bases of Euterpe globosa fronds. A revised key to genera of Neotropical Litosomini is presented.
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Affiliation(s)
- Robert S Anderson
- Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, ON. Canada K1P 6P4;
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Wickert AD, Mitrovica JX, Williams C, Anderson RS. Gradual demise of a thin southern Laurentide ice sheet recorded by Mississippi drainage. Nature 2013; 502:668-71. [PMID: 24172978 DOI: 10.1038/nature12609] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 08/28/2013] [Indexed: 11/10/2022]
Abstract
At the Last Glacial Maximum (LGM), about 21,000 years before present, land-based ice sheets held enough water to reduce global mean sea level by 130 metres. Yet after decades of study, major uncertainties remain as to the distribution of that ice. Here we test four reconstructions of North American deglacial ice-sheet history by quantitatively connecting them to high-resolution oxygen isotope (δ(18)O) records from the Gulf of Mexico using a water mixing model. For each reconstruction, we route meltwater and seasonal runoff through the time-evolving Mississippi drainage basin, which co-evolves with ice geometry and changing topography as ice loads deform the solid Earth and produce spatially variable sea level in a process known as glacial isostatic adjustment. The δ(18)O records show that the Mississippi-drained southern Laurentide ice sheet contributed only 5.4 ± 2.1 metres to global sea level rise, of which 0.66 ± 0.07 metres were released during the meltwater pulse 1A event 14,650-14,310 years before present, far less water than previously thought. In contrast, the three reconstructions based on glacial isostatic adjustment overpredict the δ(18)O-based post-LGM meltwater volume by a factor of 1.6 to 3.6. The fourth reconstruction, which is based on ice physics, has a low enough Mississippi-routed meltwater discharge to be consistent with δ(18)O constraints, but also contains the largest LGM North American ice volume. This suggests that modelling based on ice physics may be the best way of matching isotopic records while also sequestering enough water in the North American ice sheets to match the observed LGM sea level fall.
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Affiliation(s)
- Andrew D Wickert
- Institute of Arctic and Alpine Research and Department of Geological Sciences, University of Colorado, 1560 30th Street, Boulder, Colorado 80303, USA
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Douglas H, Bouchard P, Anderson RS, de Tonnancour P, Vigneault R, Webster RP. New Curculionoidea (Coleoptera) records for Canada. Zookeys 2013:13-48. [PMID: 23794927 PMCID: PMC3689125 DOI: 10.3897/zookeys.309.4667] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 05/15/2013] [Indexed: 11/12/2022] Open
Abstract
The following species of Curculionoidea are recorded from Canada for the first time, in ten cases also representing new records at the generic level: Ischnopterapion (Ischnopterapion) loti (Kirby, 1808); Stenopterapion meliloti (Kirby, 1808) (both Brentidae); Atrichonotus taeniatulus (Berg, 1881); Barinus cribricollis (LeConte, 1876); Caulophilus dubius (Horn, 1873); Cionus scrophulariae (Linnaeus, 1758); Cryptorhynchus tristis LeConte, 1876; Cylindrocopturus furnissi Buchanan, 1940; Cylindrocopturus quercus (Say, 1832); Desmoglyptus crenatus (LeConte, 1876); Pnigodes setosus LeConte, 1876; Pseudopentarthrum parvicollis (Casey, 1892); Sibariops confinis (LeConte, 1876); Sibariops confusus (Boheman, 1836); Smicronyx griseus LeConte, 1876; Smicronyx lineolatus Casey, 1892; Euwallacea validus (Eichhoff, 1875); Hylocurus rudis (LeConte, 1876); Lymantor alaskanus Wood, 1978; Phloeotribus scabricollis (Hopkins, 1916); Scolytus oregoni Blackman, 1934; Xyleborus celsus Eichhoff, 1868; Xyleborus ferrugineus (Fabricius, 1801); Xylosandrus crassiusculus (Motschulsky, 1866) (all Curculionidae). In addition the following species were recorded for the first time from these provinces and territories: Yukon - Dendroctonus simplex LeConte, 1868; Phloetribus piceae Swaine, 1911 (both Curculionidae); Northwest Territories - Loborhynchapion cyanitinctum (Fall, 1927) (Brentidae); Nunavut - Dendroctonus simplex LeConte, 1868 (Curculionidae); Alberta - Anthonomus tectus LeConte, 1876; Promecotarsus densus Casey, 1892; Dendroctonus ponderosae Hopkins, 1902; Hylastes macer LeConte, 1868; Rhyncolus knowltoni (Thatcher, 1940); Scolytus schevyrewi Semenov Tjan-Shansky, 1902 (all Curculionidae); Saskatchewan - Phloeotribus liminaris (Harris, 1852); Rhyncolus knowltoni (Thatcher, 1940); Scolytus schevyrewi Semenov Tjan-Shansky, 1902 (all Curculionidae); Manitoba - Cosmobaris scolopacea Germar, 1819; Listronotus maculicollis (Kirby, 1837); Listronotus punctiger LeConte, 1876; Scolytus schevyrewi Semenov Tjan-Shansky, 1902; Tyloderma foveolatum (Say, 1832); (all Curculionidae); Ontario - Trichapion nigrum (Herbst, 1797); Nanophyes marmoratus marmoratus (Goeze, 1777) (both Brentidae); Asperosoma echinatum (Fall, 1917); Micracis suturalis LeConte, 1868; Orchestes alni (Linnaeus, 1758); Phloeosinus pini Swaine, 1915; Scolytus schevyrewi Semenov Tjan-Shansky, 1902; Xyleborinus attenuatus (Blandford, 1894) (all Curculionidae); Quebec - Trigonorhinus alternatus (Say, 1826); Trigonorhinus tomentosus tomentosus (Say, 1826) (both Anthribidae); Trichapion nigrum (Herbst, 1797); Trichapion porcatum (Boheman, 1839); Nanophyes marmoratus marmoratus (Goeze, 1777) (all Brentidae); Lissorhoptrus oryzophilus Kuschel, 1952 (Brachyceridae); Acalles carinatus LeConte, 1876; Ampeloglypter ampelopsis (Riley, 1869); Anthonomus rufipes LeConte, 1876; Anthonomus suturalis LeConte, 1824; Ceutorhynchus hamiltoni Dietz, 1896; Curculio pardalis (Chittenden, 1908); Cyrtepistomus castaneus (Roelofs, 1873); Larinus planus (Fabricius, 1792); Mecinus janthinus (Germar, 1821); Microhyus setiger LeConte, 1876; Microplontus campestris (Gyllenhal, 1837); Orchestes alni (Linnaeus, 1758); Otiorhynchus ligustici (Linnaeus, 1758); Rhinusa neta (Germar, 1821); Trichobaris trinotata (Say, 1832); Tychius liljebladi Blatchley, 1916; Xyleborinus attenuatus (Blandford, 1894); Xyleborus affinis Eichhoff, 1868 (all Curculionidae); Sphenophorus incongruus Chittenden, 1905 (Dryophthoridae); New Brunswick - Euparius paganus Gyllenhal, 1833; Allandrus populi Pierce, 1930; Gonotropis dorsalis (Thunberg, 1796); Euxenus punctatus LeConte, 1876 (all Anthribidae); Loborhynchapion cyanitinctum (Fall, 1927) (Brentidae); Pseudanthonomus seriesetosus Dietz, 1891; Curculio sulcatulus (Casey, 1897); Lignyodes bischoffi (Blatchley, 1916); Lignyodes horridulus (Casey, 1892); Dietzella zimmermanni (Gyllenhal, 1837); Parenthis vestitus Dietz, 1896; Pelenomus squamosus LeConte, 1876; Psomus armatus Dietz, 1891; Rhyncolus macrops Buchanan, 1946; Magdalis inconspicua Horn, 1873; Magdalis salicis Horn, 1873 (all Curculionidae); Nova Scotia - Dryocoetes autographus (Ratzeburg, 1837); Ips perroti Swaine, 1915; Xyleborinus attenuatus (Blandford, 1894) (all Curculionidae); Prince Edward Island - Dryocoetes caryi Hopkins, 1915 (Curculionidae); Newfoundland - Scolytus piceae (Swaine, 1910) (Curculionidae). Published records of Dendroctonus simplex LeConte, 1868 from Northwest Territories should be reassigned to Nunavut, leaving no documented record for NWT. Collection data are provided for eight provincial and national records published without further information previously.
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Affiliation(s)
- Hume Douglas
- Entomology, Ottawa Plant Laboratories, Canadian Food Inspection Agency, Building 18, 960 Carling Avenue, Ottawa, ON, Canada, K1A 0C6
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Anderson RS. WEEVILS AND PLANTS: PHYLOGENETIC VERSUS ECOLOGICAL MEDIATION OF EVOLUTION OF HOST PLANT ASSOCIATIONS IN CURCULIONINAE (COLEOPTERA: CURCULIONIDAE). ACTA ACUST UNITED AC 2012. [DOI: 10.4039/entm125165197-1] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
AbstractA great proportion of biodiversity is accounted for by organisms, particularly insects, intimately associated with plants. Knowing whether ecological or phylogenetic factors chiefly influence the evolution of host plant associations is essential to understanding speciation in, and therefore factors influencing diversity of, phytophagous insects. Through examination of known host plant associations in Curculioninae and comparison with available reconstructed phylogenetic relationships of certain taxa of Curculioninae, little, if any, evidence for cospeciation (parallel cladogenesis) is found. In curculionine taxa where sufficient host plant and/or phylogenetic data are available, weevil species are narrowly to broadly oligophagous; a number of related weevil species are associated with a single host plant species; many weevil genera have host plant ranges spanning distantly related plant taxa; and available weevil reconstructed phylogenies are not concordant with plant relationships. Rather, for at least some weevil taxa, evolution appears to be mediated by one or more of a variety of strictly ecological factors, particularly habitat associations. General applications of these results include biological control, pollination biology, conservation and restoration biology, and use of patterns in insect – host plant associations to resolve problems in plant classification.
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Brunke A, Klimaszewski J, Anderson RS. Present taxonomic work on Staphylinidae (Coleoptera) in Canada: progress against all odds. Zookeys 2012:1-5. [PMID: 22577315 PMCID: PMC3349189 DOI: 10.3897/zookeys.186.3252] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Accepted: 04/23/2012] [Indexed: 11/12/2022] Open
Affiliation(s)
- Adam Brunke
- Zoological Museum (Natural History Museum of Denmark), University of Copenhagen, 15 Universitetsparken, Copenhagen, Denmark, 2100 DK
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Webster RP, Anderson RS, Sweeney JD, Demerchant I. New Coleoptera records from New Brunswick, Canada: Anthribidae, Brentidae, Dryophthoridae, Brachyceridae, and Curculionidae, with additions to the fauna of Quebec, Nova Scotia and Prince Edward Island. Zookeys 2012:349-406. [PMID: 22539901 PMCID: PMC3337068 DOI: 10.3897/zookeys.179.2626] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2012] [Accepted: 03/09/2012] [Indexed: 11/12/2022] Open
Abstract
We report 63 species of Curculionoidea that are new to New Brunswick (three species of Anthribidae, four species of Brentidae, three species of Dryophthoridae, three species of Brachyceridae, 50 species of Curculionidae). Among these are 27 species (two Anthribidae, two Brenthidae, one Brachyceridae, 22 Curculionidae) that are also newly recorded for the Maritime provinces, and one species, Plesiobaris disjuncta Casey (Curculionidae) that is newly recorded for Canada from New Brunswick and Quebec. Bagous planatus LeConte is reinstated to the faunal list of New Brunswick. Two species of Curculionidae are newly recorded from Nova Scotia and the Maritime provinces, and two others are reported for the first time for Prince Edward Island.
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Affiliation(s)
- Reginald P Webster
- Natural Resources Canada, Canadian Forest Service - Atlantic Forestry Centre, 1350 Regent St., P.O. Box 4000, Fredericton, NB, Canada E3B 5P7
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Dühnforth M, Anderson RS, Ward DJ, Blum A. Unsteady late Pleistocene incision of streams bounding the Colorado Front Range from measurements of meteoric and in situ10Be. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2011jf002232] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Reichert E, Johnson MT, Chacón E, Anderson RS, Wheeler TA. Biology and host preferences of Cryptorhynchus melastomae (Coleoptera: Curculionidae), a possible biocontrol agent for Miconia calvescens (Melastomataceae) in Hawaii. Environ Entomol 2010; 39:1848-1857. [PMID: 22182550 DOI: 10.1603/en10029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The introduced plant Miconia calvescens (Melastomataceae) poses a grave threat to Hawaii's native ecosystems and biodiversity. One potential candidate for classical biological control is Cryptorhynchus melastomae (Coleoptera: Curculionidae: Cryptorhynchinae), a stem-boring weevil from Central and South America. This weevil feeds on M. calvescens in its native Costa Rica and has been successfully reared under greenhouse conditions. Comparison of its environmental conditions in Costa Rica with those in the Miconia infested areas of Hawaii indicates the latter is a suitable habitat for C. melastomae. C. melastomae has one or two generations per year. Adults feed on new stems, petioles, leaf buds, veins, and lamina, whereas larvae mine the stem until pupation. Adults appear to prefer saplings for oviposition and feeding. Under greenhouse conditions both adults and larvae can seriously damage and kill small M. calvescens. Preliminary host testing indicates that C. melastomae may be family specific on Melastomataceae. However, because Hawaii lacks native melastomes and has many other serious melastome weeds, a family specific insect may be suitable as a biocontrol agent in this case.
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Affiliation(s)
- Elisabeth Reichert
- Department of Natural Resource Sciences, Macdonald Campus, McGill University, Ste-Anne-de-Bellevue, Quebec, H9X 3V9, Canada
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Abstract
Saltation is important in the transport of sand-sized granular material by wind and in the ejection of dust from the bed both on Earth and on Mars. The evolution of the saltating population and all its characteristic profiles is calculated from inception by pure aerodynamic entrainment through to steady state. Results of numerical simulations of single-grain impacts into granular beds are condensed into analytic expressions for the number and speeds of grains rebounding or rejected (splashed) from the bed. A model is combined with (i) this numerical representation, (ii) an expression for the aerodynamic entrainment rate, and (iii) the modification of the wind velocity profile by saltating grains. Calculated steady state mass fluxes are within the range of mass fluxes measured in wind tunnel experiments; mass flux is nonlinearly dependent on the shear velocity. Aerodynamically entrained grains in the system are primarily seeding agents; at steady state, aerodynamic entrainment is rare. The time for the entire system to reach steady state is roughly 1 second, or several long-trajectory hop times.
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Friedewald WF, Anderson RS. INFLUENCE OF EXTRANEOUS PROTEIN AND VIRUS CONCENTRATION ON THE INACTIVATION OF THE RABBIT PAPILLOMA VIRUS BY X-RAYS. ACTA ACUST UNITED AC 2010; 74:463-87. [PMID: 19871148 PMCID: PMC2135197 DOI: 10.1084/jem.74.5.463] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
The pronounced resistance to the x-rays manifested by the papilloma virus in ordinary suspensions is due to the protecting influence of extraneous matter and also in considerable degree to the amount of virus present in the preparation. Two to 4 million r were required to inactivate the virus contained in the crude papilloma extracts prepared for the present work, whereas 100,000 r or less was enough to inactivate comparable concentrations of virus after extraneous matter had been excluded by repeated differential centrifugation. The addition of normal rabbit serum or crystalline egg albumin to purified suspensions of virus was found to increase greatly the amount of irradiation required to inactivate the virus. Furthermore the percentage destruction of virus by a given amount of irradiation increases as the concentration is decreased by dilution with saline or buffer solutions. As little as 3,000 r will inactivate much of the virus in very dilute suspensions. The complement-binding antigen of papilloma virus suspensions is also inactivated by x-rays, but requires a somewhat larger amount of irradiation than necessary to destroy the infectivity of the suspensions. The effects of irradiation on the antiviral antibody present in the blood of animals which have become immune to the virus—an antibody that specifically fixes complement in mixture with the papilloma virus—are also conditioned by extraneous material. 250,000 to 500,000 r had only a slight effect on the antibody in whole serum, while this amount of irradiation completely inactivated comparable amounts of antibody in preparations partially purified by precipitation with ammonium sulfate. As a whole the findings indicate that under certain conditions of purity and concentration most of the radiation does not act by direct hits on virus or antibody particles, but indirectly by ionizing or exciting some other molecules present in the exposed suspension, which then react with the virus or antibody molecules.
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Affiliation(s)
- W F Friedewald
- Laboratories of The Rockefeller Institute for Medical Research and Memorial Hospital, New York
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Friedewald WF, Anderson RS. THE EFFECTS OF ROENTGEN RAYS ON CELL-VIRUS ASSOCIATIONS : FINDINGS WITH VIRUS-INDUCED RABBIT PAPILLOMAS AND FIBROMAS. ACTA ACUST UNITED AC 2010; 78:285-304. [PMID: 19871328 PMCID: PMC2135399 DOI: 10.1084/jem.78.4.285] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The virus-induced papillomas of cottontail as well as domestic rabbits regress completely within a few weeks when exposed to 5,000 r of x-ray irradiation. The x-rays do not immediately kill the papilloma cells, but lead to death by inhibiting cellular division and producing pathological changes in the cells which then continue to differentiate. The virus associated with the growths, however, not only persists in undiminished amount during regression, but often an increased yield of it can be obtained on extraction. The fibroma virus in crude extracts or in vivo is inactivated by far less irradiation than the papilloma virus. 10,000 r destroys 90 per cent or more of the infectivity of the fibroma virus, whereas at least 100,000 r is required to inactivate 50 per cent of the papilloma virus in extracts containing about the same amount of protein. No variant of the papilloma virus or fibroma virus has been encountered as a result of the irradiation.
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Affiliation(s)
- W F Friedewald
- Laboratories of The Rockefeller Institute for Medical Research and Memorial Hospital, New York
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Abstract
1. When normal, monodisperse hemocyanin (60.5S) from Limulus Rolyphemus was irradiated in neutral buffer with x-rays, several new, more rapidly sedimenting ultracentrifugal components (86S, 107S, 122S) were produced, with a corresponding loss in the amount of the unaffected protein. The amount of the effect was roughly proportional to the amount of irradiation. 2. The new resolvable components apparently represented an association of the primary particles into aggregates of 2, 3, and 4 primary particles respectively. 3. The proportional amount of hemocyanin affected decreased almost to the vanishing point as the concentration of the protein was raised to high levels. 4. The absolute effect, i.e. the total number of particles affected in a given volume, increased with the concentration of hemocyanin, at least for concentrations below 15 per cent. 5. The presence of 33 per cent horse serum during irradiation inhibited the effect on the hemocyanin almost completely, with hemocyanin concentrations of both 0.8 and 14 per cent. 6. The presence of 2.8 per cent egg albumin during irradiation lowered the effect by about 70 per cent in the case of dilute preparations (0.8 per cent hemocyanin), but by only about 25 per cent in the case of 14 per cent solutions. 7. A lowering of the solution's oxygen tension during irradiation enhanced the effect, almost doubling it in some cases. 8. The probable theoretical significance of these and other observations are discussed in the text.
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Affiliation(s)
- E G Pickels
- Laboratories of the International Health Division of The Rockefeller Foundation, New York, the Department of Physiology, School of Medicine, University of Maryland, Baltimore, and the Memorial Hospital, New York
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Abstract
Some solubility, oxidation, reduction, and compound-forming characteristics of extracts of Cypridina luciferin have been presented. A method of purification has been described which increased the amount of luciferin per unit of dry weight, as measured by the total light emitted, to about two thousand times that in the dry starting material. The best yields were from 50 to 65 per cent.
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Affiliation(s)
- R S Anderson
- Physiological Laboratory, Princeton University, Princeton, N. J
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Anderson RS, Harrison B. THE QUANTITATIVE EFFECT OF X-RAYS ON ASCORBIC ACID IN SIMPLE SOLUTION AND IN MIXTURES OF NATURALLY OCCURRING COMPOUNDS. ACTA ACUST UNITED AC 2010; 27:69-75. [PMID: 19873377 PMCID: PMC2142589 DOI: 10.1085/jgp.27.2.69] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Data on the x-ray induced reaction of ascorbic acid in simple inorganic solution, in solutions containing serum albumin, in plasma, and in muscle have been presented. The reaction occurred in the presence of serum albumin and in human plasma but was relatively small in excised rat muscle.
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Anderson RS, Witting MD. Nasogastric aspiration: a useful tool in some patients with gastrointestinal bleeding. Ann Emerg Med 2009; 55:364-5. [PMID: 20031264 DOI: 10.1016/j.annemergmed.2009.10.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2009] [Revised: 10/05/2009] [Accepted: 10/14/2009] [Indexed: 12/13/2022]
Affiliation(s)
- Robert S Anderson
- University of Maryland School of Medicine, Department of Emergency Medicine, Baltimore, MD, USA
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Anderson RS, Majka CG. Biodiversity and biosystematic research in a brave new 21st century information-technology world. Zookeys 2009. [DOI: 10.3897/zookeys.0.222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Ward DJ, Anderson RS, Guido ZS, Briner JP. Numerical modeling of cosmogenic deglaciation records, Front Range and San Juan mountains, Colorado. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2008jf001057] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Yanites BJ, Tucker GE, Anderson RS. Numerical and analytical models of cosmogenic radionuclide dynamics in landslide-dominated drainage basins. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2008jf001088] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wolsley CJ, Silvestri G, O'Neill J, Saunders KJ, Anderson RS. The association between multifocal electroretinograms and OCT retinal thickness in retinitis pigmentosa patients with good visual acuity. Eye (Lond) 2008; 23:1524-31. [PMID: 18978727 DOI: 10.1038/eye.2008.318] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
AIMS To investigate relationships between retinal morphology and retinal function in patients with retinitis pigmentosa (RP) using optical coherence tomography (OCT) and multifocal electroretinography (mfERG). METHODS In all, 14 patients with RP who had visual acuities of 0.2 logMAR or better and Humphrey central fields of 10 degrees or larger participated in the study along with 16 normal control subjects. The amplitudes and timings of the mfERG responses were compared with spatially corresponding measures of retinal layer thickness from OCT within the macula region (central 12 degrees ). RESULTS Eyes with RP showed thinning of the photoreceptor retinal (PR) layer and thickening of mid-inner retinal (MIR) layers beyond the fovea. mfERG amplitude was reduced in all regions, whereas mfERG timing was only significantly delayed at a retinal eccentricity of 6-12 degrees and was otherwise preserved within the foveal and parafoveal retina (0-6 degrees). PR layer thickness was correlated with mfERG amplitude across the macula region. mfERG timing was correlated with the total change in retinal thickness (combined PR thinning and MIR thickening) at an eccentricity of 6-12 degrees. CONCLUSIONS The relationship between mfERG timing and retinal thickness in RP is dependent on the retinal eccentricity. Preserved timing in the central retina (0-6 degrees ), despite significant disruption to retinal laminar structure, could be suggestive of inner retinal remodelling or functional redundancy. Cone system activity derived from mfERG amplitude appears to be related to the thickness of the photoreceptor layer in the macula region.
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Affiliation(s)
- C J Wolsley
- Vision Science Research Group, Department of Optometry, University of Ulster, Coleraine, UK.
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Anderson RS. The chemiluminescence response of bivalve haemocytes: utility in screening for immunomodulators and as a biomarker. Biomarkers 2008; 4:531-6. [DOI: 10.1080/135475099230688] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Wobus CW, Kean JW, Tucker GE, Anderson RS. Modeling the evolution of channel shape: Balancing computational efficiency with hydraulic fidelity. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jf000914] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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