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Bruner E, Eisová S. Vascular microforamina and endocranial surface: Normal variation and distribution in adult humans: Vascular biology. Anat Rec (Hoboken) 2024. [PMID: 38465854 DOI: 10.1002/ar.25426] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 02/20/2024] [Accepted: 02/26/2024] [Indexed: 03/12/2024]
Abstract
The term craniovascular traits refers to the imprints left by arteries and veins on the skull bones. These features can be used in biological anthropology and archaeology to investigate the morphology of the vascular network in extinct species and past populations. Generally, the term refers to macrovascular features of the endocranial cavity, like those associated with the middle meningeal artery, venous sinuses, emissary foramina, and diploic channels. However, small vascular passages (here called microforamina or microchannels) have been occasionally described on the endocranial surface. The larger ones (generally with a diameter between 0.5 and 2.0 mm) can be detected through medical scanners on osteological collections. In this study, we describe and quantify the number and distribution of these microforamina in adult humans (N = 45) and, preliminarily, in a small sample of children (N = 7). Adults display more microchannels than juvenile skulls. A higher frequency in females is also observed, although this result is not statistically significant and might be associated with allometric cranial variations. The distribution of the microforamina is particularly concentrated on the top of the vault, in particular along the sagittal, metopic, and coronal sutures, matching the course of major venous sinuses and parasagittal bridging veins. Nonetheless, the density is lower in the region posterior to bregma. Beyond oxygenation, these vessels are likely involved in endocranial thermal regulation, infection, inflammation, and immune responses, and their distribution and prevalence can hence be of interest in human biology, evolutionary anthropology, and medicine.
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Affiliation(s)
- Emiliano Bruner
- Centro Nacional de Investigación sobre la Evolución Humana, Burgos, Spain
- Alzheimer's Centre Reina Sofia-CIEN Foundation-ISCIII, Madrid, Spain
| | - Stanislava Eisová
- Antropologické oddělení, Přírodovědecké muzeum, Národní Muzeum, Prague, Czech Republic
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Kočí T, Gašparič R, Buckeridge J, Kočová Veselská M, Šoster A. The first record of a Konservat-Lagerstätten in which early post-settlement stages of fossil archaeobalanids (Cirripedia: Balanomorpha) are preserved. Integr Zool 2024; 19:200-223. [PMID: 37248329 DOI: 10.1111/1749-4877.12728] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A diverse sessile barnacle fauna from a Miocene shallow-water deposit at Dolnja Stara vas in Slovenia is described. It includes the first descriptions of early post settlement juveniles of Actinobalanus sloveniensis attached to mangrove leaves. These represent three distinct growth phases, the earliest being interpreted as being less than 24 h post settlement, the others being 1 to 2 days post settlement. An assessment of their taphonomy is provided. Associated adult balanomorphs are attached to a variety of organic substrates, including mangrove leaves and branches, fragments of the conifers ?Taxodioxylon, Carapoxylon, pine cones, molluscs, and cetacean bones. The barnacles include A. sloveniensis, Amphibalanus venustus, and Perforatus perforatus-many with opercula retained within the shells. A. venustus retains some of the original shell color. This is the second record of barnacle-plant associations from the Central Paratethys from Kamnik and Trbovlje. The paleoecology and paleogeography of the site are discussed.
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Affiliation(s)
- Tomáš Kočí
- Ivančická 581, Prague, Czech Republic
- Palaeontological Department, Natural History Museum, National Museum, Prague, Czech Republic
| | - Rok Gašparič
- Oertijdmuseum, Bosscheweg 80, Boxtel, 5293 WB, The Netherlands
- Institute for Palaeobiology and Evolution, Novi Trg, Kamnik, Slovenia
| | - John Buckeridge
- Earth and Oceanic Systems Group, RMIT University, Melbourne, Australia
- Museums Victoria, Carlton, Victoria, Australia
| | - Martina Kočová Veselská
- Department of Paleobiology and Paleoecology, Institute of Geology of the Czech Academy of Sciences, Prague, Czech Republic
- Institute of Geology and Palaeontology, Charles University, Prague, Czech Republic
| | - Aleš Šoster
- Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia
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Špitalská E, Ševčík M, Peresh YY, Benda P. Bartonella in bat flies from the Egyptian fruit bat in the Middle East. Parasitol Res 2024; 123:144. [PMID: 38411931 PMCID: PMC10899309 DOI: 10.1007/s00436-024-08165-6] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 02/15/2024] [Indexed: 02/28/2024]
Abstract
In the family of fruit bats, Pteropodidae Gray, 1821, as in the third most diverse group of bats (Chiroptera), the bacterium of the genus Bartonella was detected in several species as well as in a few species of their insect ectoparasites in some tropical and sub-tropical regions of the Old World. The Egyptian fruit bat, Rousettus aegyptiacus (Geoffroy, 1810), is one of the most widespread fruit bats, occurring between South Africa, Senegal, and Pakistan. In this bat species, Candidatus Bartonella rousetti has been detected in three African populations in Nigeria, Kenya, and Zambia. This fruit bat, however, also occurs in the Palaearctic, an area isolating the species geographically and phylogenetically from the Afrotropical part of its distribution range. We screened the blood-sucking bat flies (family Nycteribiidae) from R. aegyptiacus for the presence of the Bartonella bacteria. A rich material of bat fly Eucampsipoda aegyptia (Macquart, 1850), a monoxenous ectoparasite of the Egyptian fruit bats, was collected at 26 localities in seven countries (Egypt, Iran, Jordan, Lebanon, Oman, United Arab Emirates, and Yemen) of the Middle East in 2007-2013. The DNA isolates from the bat flies were subjected to a three-marker (gltA, ssrA, and intergenic spacer region, ITS) multilocus sequence analysis. Based on the amplification of the fragment of ssrA gene by a real-time PCR, 65 E. aegyptia samples from 19 localities in all seven countries were positive for the bacteria. One to five Bartonella-positive individuals of E. aegyptia were collected per one individual of R. aegyptiacus. An analysis of the ITS and gltA genes indicated the presence of an uncultured Bartonella sp., belonging to the Cand. B. rousetti genogroup, identified from populations of the Egyptian fruit bat in Africa. These results support the hypothesis that Bartonella's diversity corresponds to its host's diversity (and phylogenetic structure). Specific lineages of pathogens are present in specific phylogenetic groups of bats.
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Affiliation(s)
- Eva Špitalská
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Dúbravská Cesta 9, 845 05, Bratislava, Slovakia.
| | - Martin Ševčík
- Department of Zoology, Faculty of Science, Charles University, Viničná 7, 128 43, Praha 2, Czech Republic
| | - Yevheniy-Yuliy Peresh
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Dúbravská Cesta 9, 845 05, Bratislava, Slovakia
| | - Petr Benda
- Department of Zoology, Faculty of Science, Charles University, Viničná 7, 128 43, Praha 2, Czech Republic
- Department of Zoology, National Museum (Natural History), Václavské nám. 68, 115 79, Praha 1, Czech Republic
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Roháček J, Hoffeins C. A New Species of Hemilauxania Hennig (Lauxaniidae) from the Lower Eocene Oise Amber-The Oldest Record of Schizophora (Diptera)? Insects 2023; 14:835. [PMID: 37999034 PMCID: PMC10671899 DOI: 10.3390/insects14110835] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 10/19/2023] [Accepted: 10/19/2023] [Indexed: 11/25/2023]
Abstract
Hemilauxania parvula sp. nov., a new fossil species of the family Lauxaniidae (Diptera: Acalyptratae), is described and illustrated from Oise amber, France (Eocene, lower Ypresian, ca 53 Ma), and its relationship is discussed. Inasmuch as this first finding of a member of Schizophora in Oise amber probably represents the oldest known record of this group of Diptera, the age of Schizophora, based on the known fossil records, is discussed.
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Affiliation(s)
- Jindřich Roháček
- Entomology, Silesian Museum, Nádražní okruh 31, 746 01 Opava, Czech Republic
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Fornaini NR, Bergelová B, Gvoždík V, Černohorská H, Krylov V, Kubíčková S, Fokam EB, Badjedjea G, Evans BJ, Knytl M. Consequences of polyploidy and divergence as revealed by cytogenetic mapping of tandem repeats in African clawed frogs ( Xenopus, Pipidae). EUR J WILDLIFE RES 2023; 69:81. [PMID: 37483536 PMCID: PMC10361878 DOI: 10.1007/s10344-023-01709-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 05/13/2023] [Accepted: 06/27/2023] [Indexed: 07/25/2023]
Abstract
Repetitive elements have been identified in several amphibian genomes using whole genome sequencing, but few studies have used cytogenetic mapping to visualize these elements in this vertebrate group. Here, we used fluorescence in situ hybridization and genomic data to map the U1 and U2 small nuclear RNAs and histone H3 in six species of African clawed frog (genus Xenopus), including, from subgenus Silurana, the diploid Xenopus tropicalis and its close allotetraploid relative X. calcaratus and, from subgenus Xenopus, the allotetraploid species X. pygmaeus, X. allofraseri, X. laevis, and X. muelleri. Results allowed us to qualitatively evaluate the relative roles of polyploidization and divergence in the evolution of repetitive elements because our focal species include allotetraploid species derived from two independent polyploidization events - one that is relatively young that gave rise to X. calcaratus and another that is older that gave rise to the other (older) allotetraploids. Our results demonstrated conserved loci number and position of signals in the species from subgenus Silurana; allotetraploid X. calcaratus has twice as many signals as diploid X. tropicalis. However, the content of repeats varied among the other allotetraploid species. We detected almost same number of signals in X. muelleri as in X. calcaratus and same number of signals in X. pygmaeus, X. allofraseri, X. laevis as in the diploid X. tropicalis. Overall, these results are consistent with the proposal that allopolyploidization duplicated these tandem repeats and that variation in their copy number was accumulated over time through reduction and expansion in a subset of the older allopolyploids.
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Affiliation(s)
- Nicola R. Fornaini
- Department of Cell Biology, Faculty of Science, Charles University, Viničná 7, Prague, 12843 Czech Republic
| | - Barbora Bergelová
- Department of Cell Biology, Faculty of Science, Charles University, Viničná 7, Prague, 12843 Czech Republic
| | - Václav Gvoždík
- Institute of Vertebrate Biology of the Czech Academy of Sciences, Brno, Czech Republic
- Department of Zoology, National Museum of the Czech Republic, Prague, Czech Republic
| | - Halina Černohorská
- Department of Genetics and Reproduction, CEITEC - Veterinary Research Institute, Hudcova 296/70, Brno, 62100 Czech Republic
| | - Vladimír Krylov
- Department of Cell Biology, Faculty of Science, Charles University, Viničná 7, Prague, 12843 Czech Republic
| | - Svatava Kubíčková
- Department of Genetics and Reproduction, CEITEC - Veterinary Research Institute, Hudcova 296/70, Brno, 62100 Czech Republic
| | - Eric B. Fokam
- Department of Animal Biology and Conservation, University of Buea, PO Box 63, Buea, 00237 Cameroon
| | - Gabriel Badjedjea
- Department of Aquatic Ecology, Biodiversity Monitoring Center, University of Kisangani, Kisangani, Democratic Republic of the Congo
| | - Ben J. Evans
- Department of Biology, McMaster University, 1280 Main Street West, Hamilton, ON L8S4K1 Canada
| | - Martin Knytl
- Department of Cell Biology, Faculty of Science, Charles University, Viničná 7, Prague, 12843 Czech Republic
- Department of Biology, McMaster University, 1280 Main Street West, Hamilton, ON L8S4K1 Canada
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Morrison CA, Butler SJ, Clark JA, Arizaga J, Baltà O, Cepák J, Nebot AL, Piha M, Thorup K, Wenninger T, Robinson RA, Gill JA. Demographic variation in space and time: implications for conservation targeting. R Soc Open Sci 2022; 9:211671. [PMID: 35360351 PMCID: PMC8965396 DOI: 10.1098/rsos.211671] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 02/28/2022] [Indexed: 05/03/2023]
Abstract
The dynamics of wild populations are governed by demographic rates which vary spatially and/or temporally in response to environmental conditions. Conservation actions for widespread but declining populations could potentially exploit this variation to target locations (or years) in which rates are low, but only if consistent spatial or temporal variation in demographic rates occurs. Using long-term demographic data for wild birds across Europe, we show that productivity tends to vary between sites (consistently across years), while survival rates tend to vary between years (consistently across sites), and that spatial synchrony is more common in survival than productivity. Identifying the conditions associated with low demographic rates could therefore facilitate spatially targeted actions to improve productivity or (less feasibly) forecasting and temporally targeting actions to boost survival. Decomposing spatio-temporal variation in demography can thus be a powerful tool for informing conservation policy and for revealing appropriate scales for actions to influence demographic rates.
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Affiliation(s)
- Catriona A. Morrison
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | - Simon J. Butler
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | - Jacquie A. Clark
- British Trust for Ornithology, The Nunnery, Thetford IP24 2PU, UK
| | - Juan Arizaga
- Department of Ornithology, Aranzadi Sciences Society, Zorroagagaina 11, E20014 Donostia, Spain
| | - Oriol Baltà
- Catalan Ornithological Institute, Nat-Museu de Ciències Naturals de Barcelona, Pl. Leonardo da Vinci, 4-5 08019 Barcelona, Spain
| | - Jaroslav Cepák
- Bird Ringing Centre, National Museum, Hornoměcholupská 34, CZ-10200 10 Praha, Czech Republic
| | - Arantza Leal Nebot
- SEO/BirdLife, Ciencia Ciudadana, C/Melquiades Biencinto, 34 - 28053 Madrid, Spain
| | - Markus Piha
- Finnish Museum of Natural History – LUOMUS, P. O. Box 17, FI-00014 University of Helsinki, Finland
| | - Kasper Thorup
- Center for Macroecology, Evolution and Climate, Natural History Museum of Denmark, University of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen, Denmark
| | - Thomas Wenninger
- Swedish Museum of Natural History, Bird Ringing Centre, Box 50007, S-104 05 Stockholm, Sweden
| | | | - Jennifer A. Gill
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
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Papac L, Ernée M, Dobeš M, Langová M, Rohrlach AB, Aron F, Neumann GU, Spyrou MA, Rohland N, Velemínský P, Kuna M, Brzobohatá H, Culleton B, Daněček D, Danielisová A, Dobisíková M, Hložek J, Kennett DJ, Klementová J, Kostka M, Krištuf P, Kuchařík M, Hlavová JK, Limburský P, Malyková D, Mattiello L, Pecinovská M, Petriščáková K, Průchová E, Stránská P, Smejtek L, Špaček J, Šumberová R, Švejcar O, Trefný M, Vávra M, Kolář J, Heyd V, Krause J, Pinhasi R, Reich D, Schiffels S, Haak W. Dynamic changes in genomic and social structures in third millennium BCE central Europe. Sci Adv 2021; 7:7/35/eabi6941. [PMID: 34433570 PMCID: PMC8386934 DOI: 10.1126/sciadv.abi6941] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 07/02/2021] [Indexed: 05/25/2023]
Abstract
Europe's prehistory oversaw dynamic and complex interactions of diverse societies, hitherto unexplored at detailed regional scales. Studying 271 human genomes dated ~4900 to 1600 BCE from the European heartland, Bohemia, we reveal unprecedented genetic changes and social processes. Major migrations preceded the arrival of "steppe" ancestry, and at ~2800 BCE, three genetically and culturally differentiated groups coexisted. Corded Ware appeared by 2900 BCE, were initially genetically diverse, did not derive all steppe ancestry from known Yamnaya, and assimilated females of diverse backgrounds. Both Corded Ware and Bell Beaker groups underwent dynamic changes, involving sharp reductions and complete replacements of Y-chromosomal diversity at ~2600 and ~2400 BCE, respectively, the latter accompanied by increased Neolithic-like ancestry. The Bronze Age saw new social organization emerge amid a ≥40% population turnover.
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Affiliation(s)
- Luka Papac
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, 07745 Jena, Germany.
| | - Michal Ernée
- Institute of Archaeology of the Czech Academy of Sciences, Prague, Letenská 4, Prague 1, CZ 118 01, Czech Republic
| | - Miroslav Dobeš
- Institute of Archaeology of the Czech Academy of Sciences, Prague, Letenská 4, Prague 1, CZ 118 01, Czech Republic
| | - Michaela Langová
- Institute of Archaeology of the Czech Academy of Sciences, Prague, Letenská 4, Prague 1, CZ 118 01, Czech Republic
| | - Adam B Rohrlach
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, 07745 Jena, Germany
- ARC Centre of Excellence for Mathematical and Statistical Frontiers, School of Mathematical Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Franziska Aron
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, 07745 Jena, Germany
| | - Gunnar U Neumann
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, 07745 Jena, Germany
| | - Maria A Spyrou
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, 07745 Jena, Germany
| | - Nadin Rohland
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - Petr Velemínský
- Department of Anthropology, The National Museum, Prague, Cirkusová 1740, Prague 9, Horní Počernice, CZ 193 00, Czech Republic
| | - Martin Kuna
- Institute of Archaeology of the Czech Academy of Sciences, Prague, Letenská 4, Prague 1, CZ 118 01, Czech Republic
| | - Hana Brzobohatá
- Institute of Archaeology of the Czech Academy of Sciences, Prague, Letenská 4, Prague 1, CZ 118 01, Czech Republic
| | - Brendan Culleton
- Institutes of Energy and the Environments, Pennsylvania State University, University Park, PA 16802, USA
| | - David Daněček
- Institute of Archaeology of the Czech Academy of Sciences, Prague, Letenská 4, Prague 1, CZ 118 01, Czech Republic
- Central Bohemian Museum in Roztoky u Prahy, Zámek 1, Roztoky, CZ 252 63, Czech Republic
| | - Alžběta Danielisová
- Institute of Archaeology of the Czech Academy of Sciences, Prague, Letenská 4, Prague 1, CZ 118 01, Czech Republic
| | - Miluše Dobisíková
- Department of Anthropology, The National Museum, Prague, Cirkusová 1740, Prague 9, Horní Počernice, CZ 193 00, Czech Republic
| | - Josef Hložek
- Institute of Archaeology of the Czech Academy of Sciences, Prague, Letenská 4, Prague 1, CZ 118 01, Czech Republic
- Department of Archaeology, Faculty of Philosophy and Arts, University of West Bohemia in Pilsen, Sedláčkova 38, Pilsen, CZ 301 00, Czech Republic
| | - Douglas J Kennett
- Department of Anthropology, University of California, Santa Barbara, Santa Barbara, CA 93106, USA
| | - Jana Klementová
- Central Bohemian Museum in Roztoky u Prahy, Zámek 1, Roztoky, CZ 252 63, Czech Republic
| | - Michal Kostka
- The City of Prague Museum, Kožná 1/475, Prague 1, CZ 110 00, Czech Republic
| | - Petr Krištuf
- Department of Archaeology, Faculty of Philosophy and Arts, University of West Bohemia in Pilsen, Sedláčkova 38, Pilsen, CZ 301 00, Czech Republic
| | - Milan Kuchařík
- Labrys o.p.s., Hloubětínská 16/11, Prague 9, CZ 198 00, Czech Republic
| | - Jana Kuljavceva Hlavová
- Institute of Preservation of Archaeological Heritage of Northwest Bohemia, Jana Žižky 835, Most, CZ 434 01, Czech Republic
| | - Petr Limburský
- Institute of Archaeology of the Czech Academy of Sciences, Prague, Letenská 4, Prague 1, CZ 118 01, Czech Republic
| | - Drahomíra Malyková
- Institute of Archaeology of the Czech Academy of Sciences, Prague, Letenská 4, Prague 1, CZ 118 01, Czech Republic
| | - Lucia Mattiello
- Central Bohemian Archaeological Heritage Institute, Nad Olšinami 3/448, Prague 10, CZ 100 00, Czech Republic
| | - Monika Pecinovská
- Institute of Archaeology of the Czech Academy of Sciences, Prague, Letenská 4, Prague 1, CZ 118 01, Czech Republic
| | | | - Erika Průchová
- Institute of Archaeology, Faculty of Arts, University of South Bohemia in České Budějovice, Branišovská 31a, CZ 370 05, České Budějovice, Czech Republic
| | - Petra Stránská
- Institute of Archaeology of the Czech Academy of Sciences, Prague, Letenská 4, Prague 1, CZ 118 01, Czech Republic
| | - Lubor Smejtek
- Central Bohemian Archaeological Heritage Institute, Nad Olšinami 3/448, Prague 10, CZ 100 00, Czech Republic
| | - Jaroslav Špaček
- The Municipal Museum in Čelákovice (formerly), Komenského 1646, Čelákovice, CZ 250 88, Czech Republic (private)
| | - Radka Šumberová
- Institute of Archaeology of the Czech Academy of Sciences, Prague, Letenská 4, Prague 1, CZ 118 01, Czech Republic
| | - Ondřej Švejcar
- Institute of Archaeology of the Czech Academy of Sciences, Prague, Letenská 4, Prague 1, CZ 118 01, Czech Republic
| | - Martin Trefný
- Friedrich Alexander University Erlangen/Nürnberg, Kochstrasse 4/18, DE 91054 Erlangen, Germany
| | - Miloš Vávra
- Central Bohemian Archaeological Heritage Institute, Nad Olšinami 3/448, Prague 10, CZ 100 00, Czech Republic
| | - Jan Kolář
- Department of Vegetation Ecology, Institute of Botany of the Czech Academy of Sciences, Lidická 25/27, Brno 60200, Czech Republic
- Institute of Archaeology and Museology, Masaryk University, Arne Nováka 1, Brno 60200, Czech Republic
| | - Volker Heyd
- Department of Cultures/Archaeology, P.O. Box 59, Unioninkatu 38, 00014 University of Helsinki, Helsinki, Finland
| | - Johannes Krause
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, 07745 Jena, Germany
- Max Planck Institute for Evolutionary Anthropology, 04103 Leipzig, Germany
| | - Ron Pinhasi
- Department of Evolutionary Anthropology, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
| | - David Reich
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
- Department of Human Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA
- Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA
- Howard Hughes Medical Institute, Harvard Medical School, Boston, MA 02115, USA
| | - Stephan Schiffels
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, 07745 Jena, Germany
| | - Wolfgang Haak
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, 07745 Jena, Germany.
- School of Biological Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
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8
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Nečas T, Badjedjea G, Vopálenský M, Gvoždík V. Congolius, a new genus of African reed frog endemic to the central Congo: A potential case of convergent evolution. Sci Rep 2021; 11:8338. [PMID: 33863953 PMCID: PMC8052363 DOI: 10.1038/s41598-021-87495-2] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 03/22/2021] [Indexed: 02/07/2023] Open
Abstract
The reed frog genus Hyperolius (Afrobatrachia, Hyperoliidae) is a speciose genus containing over 140 species of mostly small to medium-sized frogs distributed in sub-Saharan Africa. Its high level of colour polymorphism, together with in anurans relatively rare sexual dichromatism, make systematic studies more difficult. As a result, the knowledge of the diversity and taxonomy of this genus is still limited. Hyperolius robustus known only from a handful of localities in rain forests of the central Congo Basin is one of the least known species. Here, we have used molecular methods for the first time to study the phylogenetic position of this taxon, accompanied by an analysis of phenotype based on external (morphometric) and internal (osteological) morphological characters. Our phylogenetic results undoubtedly placed H. robustus out of Hyperolius into a common clade with sympatric Cryptothylax and West African Morerella. To prevent the uncovered paraphyly, we place H. robustus into a new genus, Congolius. The review of all available data suggests that the new genus is endemic to the central Congolian lowland rain forests. The analysis of phenotype underlined morphological similarity of the new genus to some Hyperolius species. This uniformity of body shape (including cranial shape) indicates that the two genera have either retained ancestral morphology or evolved through convergent evolution under similar ecological pressures in the African rain forests.
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Affiliation(s)
- Tadeáš Nečas
- Czech Academy of Sciences, Institute of Vertebrate Biology, Květná 8, 603 65, Brno, Czech Republic.
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic.
| | - Gabriel Badjedjea
- Biodiversity Monitoring Centre, Department of Ecology and Biodiversity of Aquatic Resources, University of Kisangani, Avenue Munyororo 550, Kisangani, Democratic Republic of the Congo
| | - Michal Vopálenský
- Czech Academy of Sciences, Institute of Theoretical and Applied Mechanics, Prosecká 76, 190 00, Prague, Czech Republic
| | - Václav Gvoždík
- Czech Academy of Sciences, Institute of Vertebrate Biology, Květná 8, 603 65, Brno, Czech Republic.
- Department of Zoology, National Museum, Cirkusová 1740, 193 00, Prague, Czech Republic.
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Niissalo MA, Leong-Škorničková J, Šída O, Khew GS. Population genomics reveal apomixis in a novel system: uniclonal female populations dominate the tropical forest herb family, Hanguanaceae (Commelinales). AoB Plants 2020; 12:plaa053. [PMID: 33204406 PMCID: PMC7653639 DOI: 10.1093/aobpla/plaa053] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 09/23/2020] [Indexed: 06/11/2023]
Abstract
The abundance of apomixis in tropical plant genera is poorly understood, and this affects the understanding of speciation and evolution. Hanguanaceae is a tropical monogeneric, dioecious plant family. All but two species are solitary herbs with no capability to spread vegetatively. Viable seeds are often produced when males have not been observed. Our aim was to investigate the presence of apomixis in Hanguana. We used reduced representation genomics to study phylogenetics and genetic variability in all populations of Hanguana in Singapore. We measured genome sizes and estimated ploidy levels in 10 species. Almost all taxa tested were genetically uniform (uniclonal) regardless of the extent of their distribution. The distribution of single clones over distinct localities supports our hypothesis of apomictic reproduction. Only one sexually reproducing native species was detected. Triploid and pentaploid states support our hypothesis that the type of apomixis in Hanguana is gametophytic. Population genomics tools offer a quick and cost-effective way of detecting excess clonality and thereby inferring apomixis. In the case of Hanguana, the presence of male plants is a strong indicator of sexual reproduction, whereas genome triplication is indicative of apomictic reproduction.
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Affiliation(s)
- Matti A Niissalo
- Singapore Botanic Gardens, National Parks Board Singapore, Singapore, Singapore
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
| | | | - Otakar Šída
- Department of Botany, National Museum, Cirkusová, Prague, Czech Republic
| | - Gillian S Khew
- Singapore Botanic Gardens, National Parks Board Singapore, Singapore, Singapore
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10
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Evans BJ, Gansauge MT, Stanley EL, Furman BLS, Cauret CMS, Ofori-Boateng C, Gvoždík V, Streicher JW, Greenbaum E, Tinsley RC, Meyer M, Blackburn DC. Xenopus fraseri: Mr. Fraser, where did your frog come from? PLoS One 2019; 14:e0220892. [PMID: 31509539 PMCID: PMC6738922 DOI: 10.1371/journal.pone.0220892] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 07/23/2019] [Indexed: 01/06/2023] Open
Abstract
A comprehensive, accurate, and revisable alpha taxonomy is crucial for biodiversity studies, but is challenging when data from reference specimens are difficult to collect or observe. However, recent technological advances can overcome some of these challenges. To illustrate this, we used modern approaches to tackle a centuries-old taxonomic enigma presented by Fraser’s Clawed Frog, Xenopus fraseri, including whether X. fraseri is different from other species, and if so, where it is situated geographically and phylogenetically. To facilitate these inferences, we used high-resolution techniques to examine morphological variation, and we generated and analyzed complete mitochondrial genome sequences from all Xenopus species, including >150-year-old type specimens. Our results demonstrate that X. fraseri is indeed distinct from other species, firmly place this species within a phylogenetic context, and identify its minimal geographic distribution in northern Ghana and northern Cameroon. These data also permit novel phylogenetic resolution into this intensively studied and biomedically important group. Xenopus fraseri was formerly thought to be a rainforest endemic placed alongside species in the amieti species group; in fact this species occurs in arid habitat on the borderlands of the Sahel, and is the smallest member of the muelleri species group. This study illustrates that the taxonomic enigma of Fraser’s frog was a combined consequence of sparse collection records, interspecies conservation and intraspecific polymorphism in external anatomy, and type specimens with unusual morphology.
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Affiliation(s)
- Ben J. Evans
- Department of Biology, McMaster University, Hamilton, ON, Canada
- * E-mail:
| | - Marie-Theres Gansauge
- Max Planck Institute for Evolutionary Anthropology, Deutscher Platz, Leipzig, Germany
| | - Edward L. Stanley
- Florida Museum of Natural History, University of Florida, Gainesville, FL, United States of America
| | - Benjamin L. S. Furman
- Department of Biology, McMaster University, Hamilton, ON, Canada
- Department of Zoology, Beaty Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | | | | | - Václav Gvoždík
- Institute of Vertebrate Biology of the Czech Academy of Sciences, Czech Republic
- Department of Zoology, National Museum, Prague, Czech Republic
| | | | - Eli Greenbaum
- Department of Biological Sciences, University of Texas at El Paso, El Paso, United States of America
| | - Richard C. Tinsley
- School of Biological Sciences, University of Bristol, Bristol, United Kingdom
| | - Matthias Meyer
- Max Planck Institute for Evolutionary Anthropology, Deutscher Platz, Leipzig, Germany
| | - David C. Blackburn
- Florida Museum of Natural History, University of Florida, Gainesville, FL, United States of America
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11
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Brejcha J, Bataller JV, Bosáková Z, Geryk J, Havlíková M, Kleisner K, Maršík P, Font E. Body coloration and mechanisms of colour production in Archelosauria: the case of deirocheline turtles. R Soc Open Sci 2019; 6:190319. [PMID: 31417734 PMCID: PMC6689573 DOI: 10.1098/rsos.190319] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 06/28/2019] [Indexed: 05/11/2023]
Abstract
Animal body coloration is a complex trait resulting from the interplay of multiple mechanisms. While many studies address the functions of animal coloration, the mechanisms of colour production still remain unknown in most taxa. Here we compare reflectance spectra, cellular, ultra- and nano-structure of colour-producing elements, and pigment types in two freshwater turtles with contrasting courtship behaviour, Trachemys scripta and Pseudemys concinna. The two species differ in the distribution of pigment cell-types and in pigment diversity. We found xanthophores, melanocytes, abundant iridophores and dermal collagen fibres in stripes of both species. The yellow chin and forelimb stripes of both P. concinna and T. scripta contain xanthophores and iridophores, but the post-orbital regions of the two species differ in cell-type distribution. The yellow post-orbital region of P. concinna contains both xanthophores and iridophores, while T. scripta has only xanthophores in the yellow-red postorbital/zygomatic regions. Moreover, in both species, the xanthophores colouring the yellow-red skin contain carotenoids, pterins and riboflavin, but T. scripta has a higher diversity of pigments than P. concinna. Trachemys s. elegans is sexually dichromatic. Differences in the distribution of pigment cell types across body regions in the two species may be related to visual signalling but do not match predictions based on courtship position. Our results demonstrate that archelosaurs share some colour production mechanisms with amphibians and lepidosaurs (i.e. vertical layering/stacking of different pigment cell types and interplay of carotenoids and pterins), but also employ novel mechanisms (i.e. nano-organization of dermal collagen) shared with mammals.
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Affiliation(s)
- Jindřich Brejcha
- Department of Philosophy and History of Science, Faculty of Science, Charles University, Viničná 7, Prague 2, 128 00, Czech Republic
- Department of Zoology, Natural History Museum, National Museum, Václavské nám. 68, Prague 1, 110 00, Czech Republic
- Department of Biophysical Chemistry, J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 3, Prague 8, 18223, Czech Republic
| | - José Vicente Bataller
- Centro de Conservación de Especies Dulceacuícolas de la Comunidad Valenciana. VAERSA-Generalitat Valenciana, El Palmar, València, 46012, Spain
| | - Zuzana Bosáková
- Department of Analytical Chemistry, Faculty of Science, Charles University, Hlavova 8, Prague 2, 128 43, Czech Republic
| | - Jan Geryk
- Department of Biology and Medical Genetics, 2nd Faculty of Medicine, Charles University and University Hospital Motol, V Úvalu 84, 150 06 Prague, Czech Republic
| | - Martina Havlíková
- Department of Analytical Chemistry, Faculty of Science, Charles University, Hlavova 8, Prague 2, 128 43, Czech Republic
| | - Karel Kleisner
- Department of Philosophy and History of Science, Faculty of Science, Charles University, Viničná 7, Prague 2, 128 00, Czech Republic
| | - Petr Maršík
- Department of Food Science, Faculty of Agrobiology, Food, and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, Prague 6, 165 00, Czech Republic
| | - Enrique Font
- Ethology Lab, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, C/ Catedrátic José Beltrán Martinez 2, Paterna, València, 46980, Spain
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12
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Burriel-Carranza B, Tarroso P, Els J, Gardner A, Soorae P, Mohammed AA, Tubati SRK, Eltayeb MM, Shah JN, Tejero-Cicuéndez H, Simó-Riudalbas M, Pleguezuelos JM, Fernández-Guiberteau D, Šmíd J, Carranza S. An integrative assessment of the diversity, phylogeny, distribution, and conservation of the terrestrial reptiles (Sauropsida, Squamata) of the United Arab Emirates. PLoS One 2019; 14:e0216273. [PMID: 31048886 PMCID: PMC6497385 DOI: 10.1371/journal.pone.0216273] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 04/17/2019] [Indexed: 11/25/2022] Open
Abstract
In the present study we use an unprecedented database of 5,535 distributional records to infer the diversity, ecological preferences and spatial distribution of the 60 species of terrestrial reptiles of the United Arab Emirates (UAE), and use the 57 native species to test the effectiveness of the protected areas’ network in conserving this unique vertebrate fauna. We infer a time-calibrated phylogeny with 146 species of squamates and 15 genes including all UAE terrestrial reptile species to determine the phylogenetic diversity (PD) and evolutionary distinctiveness (ED) of the native species and to compare it with the distribution of the hotspots of native species richness. The results of this study indicate that the sampling effort is remarkable, covering 75% of the country’s territory representing nearly the entire climatic space of the UAE defined by the mean annual temperature and the total annual precipitation, as well as the multivariate climatic space defined by a principal component analysis (PCA). Species richness is highest in the northeast of the country, in a transitional area from sandy desert to the mountainous terrain of the Hajar Mountains. The highest PD of a single square cell of 10 arc-minutes grid is of 2,430 million years (my) of accumulated evolutionary history and the strong correlation between PD and species richness suggests that the raw number of species is a good surrogate to quantify the evolutionary history (i.e., PD). The species with the highest values of ED are those in families represented by only one species in the UAE. Finally, the assessment of the UAE protected areas shows that, despite their relevance in protecting the terrestrial reptiles, they do not offer adequate protection for some threatened species. Therefore, a reassessment of some of the protected areas or the creation of species specific conservation action plans are recommended in order to ensure the preservation of the unique diversity of UAE terrestrial reptiles.
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Affiliation(s)
- Bernat Burriel-Carranza
- Institute of Evolutionary Biology (CSIC-Universitat Pompeu Fabra), Passeig Marítim de la Barceloneta, Barcelona, Spain
| | - Pedro Tarroso
- Institute of Evolutionary Biology (CSIC-Universitat Pompeu Fabra), Passeig Marítim de la Barceloneta, Barcelona, Spain
- CIBIO/InBIO, Research Centre in Biodiversity and Genetic Resources, Universidade do Porto, Campus Agrário de Vairão, Rua Padre Armando Quintas, Vairão, Vila do Conde, Portugal
| | - Johannes Els
- Breeding Centre for Endangered Arabian Wildlife, Environment and Protected Areas Authority, Sharjah, United Arab Emirates
| | - Andrew Gardner
- School of Molecular Sciences, University of Western Australia, Crawley, Western Australia, Australia
| | | | | | | | - Mohamed Mustafa Eltayeb
- Natural Resource Conservation Section, Environment Department, Dubai Municipality, Dubai, United Arab Emirates
| | - Junid Nazeer Shah
- Natural Resource Conservation Section, Environment Department, Dubai Municipality, Dubai, United Arab Emirates
| | - Héctor Tejero-Cicuéndez
- Institute of Evolutionary Biology (CSIC-Universitat Pompeu Fabra), Passeig Marítim de la Barceloneta, Barcelona, Spain
| | - Marc Simó-Riudalbas
- Institute of Evolutionary Biology (CSIC-Universitat Pompeu Fabra), Passeig Marítim de la Barceloneta, Barcelona, Spain
| | | | | | - Jiří Šmíd
- Department of Zoology, National Museum, Prague, Czech Republic
- Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Salvador Carranza
- Institute of Evolutionary Biology (CSIC-Universitat Pompeu Fabra), Passeig Marítim de la Barceloneta, Barcelona, Spain
- * E-mail:
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13
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Plášil J, Kampf AR, Škoda R, Čejka J. Nollmotzite, Mg[U V(U VIO 2) 2O 4F 3]·4H 2O, the first natural uranium oxide containing fluorine. Acta Crystallogr B Struct Sci Cryst Eng Mater 2018; 74:362-369. [PMID: 30141421 PMCID: PMC6108157 DOI: 10.1107/s2052520618007321] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 05/15/2018] [Indexed: 06/08/2023]
Abstract
Nollmotzite (IMA2017-100), Mg[UV(UVIO2)2F3O4](H2O)4, is a new uranium oxide fluoride mineral found in the Clara mine, Black Forest Mountains, Germany. Electron microprobe analysis provided the empirical formula (Mg1.06Cu0.02)Σ1.08[UV(UVIO2)2O3.85F3.15][(H2O)3.69(OH)0.31]Σ4.00 based on three U and 15 O + F atoms per formula unit. Nollmotzite is monoclinic, space group Cm, with a = 7.1015 (12) Å, b = 11.7489 (17) Å, c = 8.1954 (14) Å, β = 98.087 (14)°, V = 676.98 (19) Å3 and Z = 2. The crystal structure [twinned by reticular merohedry; refined to R = 0.0369 with GoF = 1.09 for 1527 unique observed reflections, I > 3σ(I)] is based upon [UV(UVIO2)2F3O4]2- sheets of β-U3O8 topology and contains an interlayer with MgF2(H2O)4 octahedra. Adjacent sheets are linked through F-Mg-F bonds, as well as via hydrogen bonds. The presence of fluorine and pentavalent uranium in the structure of nollmotzite has potentially important implications for the safe disposal of nuclear waste.
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Affiliation(s)
- Jakub Plášil
- Institute of Physics ASCR, v.v.i., Na Slovance 2, Praha 8, 18221, Czech Republic
| | - Anthony R. Kampf
- Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA
| | - Radek Škoda
- Department of Geological Sciences, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 61137, Czech Republic
| | - Jiří Čejka
- Department of Mineralogy and Petrology, National Museum, Cirkusová 1740, Prague 9, 19300, Czech Republic
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14
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Kacki S, Velemínský P, Lynnerup N, Kaupová S, Jeanson AL, Povýšil C, Horák M, Kučera J, Rasmussen KL, Podliska J, Dragoun Z, Smolík J, Vellev J, Brůžek J. Rich table but short life: Diffuse idiopathic skeletal hyperostosis in Danish astronomer Tycho Brahe (1546-1601) and its possible consequences. PLoS One 2018; 13:e0195920. [PMID: 29672561 PMCID: PMC5909615 DOI: 10.1371/journal.pone.0195920] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 04/02/2018] [Indexed: 12/16/2022] Open
Abstract
The exhumation of Danish astronomer Tycho Brahe (1546–1601) was performed in 2010 to verify speculative views on the cause of his death. Previous analyses of skeletal and hair remains recovered from his grave refuted the presumption that he died from poisoning. These studies also outlined the possibility that he actually died from an acute illness, echoing the rather vague and inaccurate testimony of some historical records. We performed a detailed paleopathological analysis of Tycho Brahe’s skeletal remains, along with a reconstruction of his diet based on carbon and nitrogen stable isotopes analysis and an estimate of his physical status (relative body fat) based on medullar and cortical dimensions of the femoral shaft. The astronomer’s remains exhibit bone changes indicative of diffuse idiopathic skeletal hyperostosis (DISH). The study further allows us to classify him as obese (100% reliability according to our decision tree designed from Danish males), and points out his rich diet (high input of animal protein and/or marine resources) and high social status. Comorbidities of DISH and obesity are reviewed, and their influence on health status is discussed. We further consider some conditions associated with metabolic syndrome as possible causes of Tycho Brahe’s final symptoms (urinary retention, renal failure and coma), including diabetes, alcoholic ketoacidosis and benign prostatic hypertrophy. Although a definite and specific diagnosis cannot be established, our study points to today’s civilization diseases often associated with DISH and metabolic syndrome as the possible cause of death of Tycho Brahe.
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Affiliation(s)
- Sacha Kacki
- Department of Archaeology, Durham University, Durham, United Kingdom
- PACEA–UMR 5199, University of Bordeaux, Pessac, France
| | - Petr Velemínský
- Department of Anthropology, National Museum, Prague, Czech Republic
- * E-mail:
| | - Niels Lynnerup
- Laboratory of Biological Anthropology, Institute of Forensic Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Sylva Kaupová
- Department of Anthropology, National Museum, Prague, Czech Republic
| | - Alizé Lacoste Jeanson
- Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Prague, Czech Republic
| | - Ctibor Povýšil
- Institute of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Martin Horák
- Department of Radiology, Na Homolce Hospital, Prague, Czech Republic
| | - Jan Kučera
- Nuclear Physics Institute of Czech Academy of Sciences, Husinec-Řež, Czech Republic
| | - Kaare Lund Rasmussen
- Institute of Physics, Chemistry and Pharmacy, University of Southern Denmark, Odense, Denmark
| | - Jaroslav Podliska
- Department of Archaeology, National Heritage Institute, Prague, Czech Republic
| | - Zdeněk Dragoun
- Department of Archaeology, National Heritage Institute, Prague, Czech Republic
| | - Jiří Smolík
- Institute of Chemical Process Fundamentals of Czech Academy of Sciences, Prague, Czech Republic
| | - Jens Vellev
- Department of Culture and Society–Section for Medieval and Renaissance Archaeology, Aarhus University, Højbjerg, Denmark
| | - Jaroslav Brůžek
- PACEA–UMR 5199, University of Bordeaux, Pessac, France
- Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Prague, Czech Republic
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15
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Chrtek J, Herben T, Rosenbaumová R, Münzbergová Z, Dočkalová Z, Zahradníček J, Krejčíková J, Trávníček P. Cytotype coexistence in the field cannot be explained by inter-cytotype hybridization alone: linking experiments and computer simulations in the sexual species Pilosella echioides (Asteraceae). BMC Evol Biol 2017; 17:87. [PMID: 28335715 PMCID: PMC5364689 DOI: 10.1186/s12862-017-0934-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 03/10/2017] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Processes driving ploidal diversity at the population level are virtually unknown. Their identification should use a combination of large-scale screening of ploidy levels in the field, pairwise crossing experiments and mathematical modelling linking these two types of data. We applied this approach to determine the drivers of frequencies of coexisting cytotypes in mixed-ploidy field populations of the fully sexual plant species Pilosella echioides. We examined fecundity and ploidal diversity in seeds from all possible pairwise crosses among 2x, 3x and 4x plants. Using these data, we simulated the dynamics of theoretical panmictic populations of individuals whose progeny structure is identical to that determined by the hybridization experiment. RESULTS The seed set differed significantly between the crossing treatments, being highest in crosses between diploids and tetraploids and lowest in triploid-triploid crosses. The number of progeny classes (with respect to embryo and endosperm ploidy) ranged from three in the 2x-2x cross to eleven in the 3x-3x cross. Our simulations demonstrate that, provided there is no difference in clonal growth and/or survival between cytotypes, it is a clear case of minority cytotype exclusion depending on the initial conditions with two stable states, neither of which corresponds to the ploidal structure in the field: (i) with prevalent diploids and lower proportions of other ploidies, and (ii) with prevalent tetraploids and 9% of hexaploids. By contrast, if clonal growth differs between cytotypes, minority cytotype exclusion occurs only if the role of sexual reproduction is high; otherwise differences in clonal growth are sufficient to maintain triploid prevalence (as observed in the field) independently of initial conditions. CONCLUSIONS The projections of our model suggest that the ploidal structure observed in the field can only be reached via a relatively high capacity for clonal growth (and proportionally lower sexual reproduction) in all cytotypes combined with higher clonal growth in the prevailing cytotype (3x).
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Affiliation(s)
- Jindřich Chrtek
- Institute of Botany, The Czech Academy of Sciences, CZ-252 43 Průhonice, Czech Republic
- Department of Botany, Faculty of Science, Charles University in Prague, CZ-128 01 Prague, Czech Republic
| | - Tomáš Herben
- Institute of Botany, The Czech Academy of Sciences, CZ-252 43 Průhonice, Czech Republic
- Department of Botany, Faculty of Science, Charles University in Prague, CZ-128 01 Prague, Czech Republic
| | - Radka Rosenbaumová
- Department of Botany, Natural History Museum, National Museum, CZ-193 00 Prague – Horní Počernice, Czech Republic
| | - Zuzana Münzbergová
- Institute of Botany, The Czech Academy of Sciences, CZ-252 43 Průhonice, Czech Republic
- Department of Botany, Faculty of Science, Charles University in Prague, CZ-128 01 Prague, Czech Republic
| | - Zuzana Dočkalová
- Institute of Botany, The Czech Academy of Sciences, CZ-252 43 Průhonice, Czech Republic
| | - Jaroslav Zahradníček
- Institute of Botany, The Czech Academy of Sciences, CZ-252 43 Průhonice, Czech Republic
- Department of Botany, Faculty of Science, Charles University in Prague, CZ-128 01 Prague, Czech Republic
| | - Jana Krejčíková
- Institute of Botany, The Czech Academy of Sciences, CZ-252 43 Průhonice, Czech Republic
- Department of Botany, Faculty of Science, Charles University in Prague, CZ-128 01 Prague, Czech Republic
| | - Pavel Trávníček
- Institute of Botany, The Czech Academy of Sciences, CZ-252 43 Průhonice, Czech Republic
- Department of Botany, Faculty of Science, Charles University in Prague, CZ-128 01 Prague, Czech Republic
- Faculty of Agriculture, University of South Bohemia, CZ-370 05 České Budějovice, Czech Republic
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16
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Ferrão M, Colatreli O, de Fraga R, Kaefer IL, Moravec J, Lima AP. High Species Richness of Scinax Treefrogs (Hylidae) in a Threatened Amazonian Landscape Revealed by an Integrative Approach. PLoS One 2016; 11:e0165679. [PMID: 27806089 PMCID: PMC5091857 DOI: 10.1371/journal.pone.0165679] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Accepted: 10/14/2016] [Indexed: 11/29/2022] Open
Abstract
Rising habitat loss is one of the main drivers of the global amphibian decline. Nevertheless, knowledge of amphibian diversity needed for effective habitat protection is still highly inadequate in remote tropical regions, the greater part of the Amazonia. In this study we integrated molecular, morphological and bioacoustic evidence to evaluate the species richness of the treefrogs genus Scinax over a 1000 km transect across rainforest of the Purus-Madeira interfluve, and along the east bank of the upper Madeira river, Brazilian Amazonia. Analysis revealed that 82% of the regional species richness of Scinax is still undescribed; two nominal species, seven confirmed candidate species, two unconfirmed candidate species, and one deep conspecific lineage were detected in the study area. DNA barcoding based analysis of the 16s rRNA gene indicates possible existence of three discrete species groups within the genus Scinax, in addition to the already-known S. rostratus species Group. Quantifying and characterizing the number of undescribed Scinax taxa on a regional scale, we provide a framework for future taxonomic study in Amazonia. These findings indicate that the level to which Amazonian anura species richness has been underestimated is far greater than expected. Consequently, special attention should be paid both to taxonomic studies and protection of the still-neglected Amazonian Scinax treefrogs.
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Affiliation(s)
- Miquéias Ferrão
- Programa de Pós-Graduação em Ecologia, Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil
| | - Olavo Colatreli
- Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil
| | - Rafael de Fraga
- Programa de Pós-Graduação em Ecologia, Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil
| | - Igor L. Kaefer
- Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil
| | - Jiří Moravec
- Department of Zoology, National Museum, Prague, Czech Republic
| | - Albertina P. Lima
- Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil
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