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Roseno RS, Filho LMC, Diele-Viegas LM, de Carvalho BT, Solé M. Different approaches to understanding methodological adequacy in ecophysiological studies on small ectotherms. Comp Biochem Physiol A Mol Integr Physiol 2024; 297:111726. [PMID: 39122106 DOI: 10.1016/j.cbpa.2024.111726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 08/03/2024] [Accepted: 08/06/2024] [Indexed: 08/12/2024]
Abstract
Body temperature (Tb) variation and environmental temperature gradients are more intense in small individuals because their body size allows for a more intimate relationship between Tb and the environment. To contribute to a methodological consensus on the ecophysiology of small ectotherms, we aimed to investigate whether different approaches and methodological techniques affect the measurement of critical temperatures in a small lizard (Coleodactylus meridionalis, Sphaerodactylidae) from the Atlantic Forest of southern Bahia, Brazil, and subsequently its vulnerability assessment. We measured two metrics of thermal physiology: critical thermal minimum (CTmin) and critical thermal maximum (CTmax). In total, four types of temperature measurements (protocols) were defined. In the first protocol, we estimated CTmax/CTmin without heating/cooling rate by directly measuring the lizard's midbody temperature. In the other three protocols, we used a ramping assay with a heating/cooling rate to estimate CTmax/CTmin in the chamber (height: 11.3 cm), substrate, and Tb of the lizard, respectively. In total 116 individuals of Coleodactylus meridionalis were collected, of which 177 CTmax and 131 CTmin were performed. C. meridionalis showed a mean CTmax of 41 °C and a mean CTmin of 8.9 °C when considering the Tb protocol, which is intermediate compared to the other protocols. The substrate temperature protocol was the closest to Tb, and for this, the best method for the small lizards using an infrared thermometer.
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Affiliation(s)
- Rafaella Silva Roseno
- Graduate Program in Zoology, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16, 45662-900 Salobrinho, Ilhéus, Bahia, Brazil; Tropical Herpetology Laboratory, Department of Biological Sciences, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16, 45662-900 Salobrinho, Ilhéus, Bahia, Brazil; Laboratory of (Bio)diversity in the Anthropocene, Biology Institute, Universidade Federal da Bahia, 1154, R. Barão de Jeremoabo, 668, 40170-115 Ondina, Salvador, Bahia, Brazil.
| | - Leildo Machado Carilo Filho
- Tropical Herpetology Laboratory, Department of Biological Sciences, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16, 45662-900 Salobrinho, Ilhéus, Bahia, Brazil. https://twitter.com/CariloLeildo
| | - Luisa Maria Diele-Viegas
- Laboratory of (Bio)diversity in the Anthropocene, Biology Institute, Universidade Federal da Bahia, 1154, R. Barão de Jeremoabo, 668, 40170-115 Ondina, Salvador, Bahia, Brazil. https://twitter.com/luisaviegas
| | - Bruno Teixeira de Carvalho
- Graduate Program in Zoology, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16, 45662-900 Salobrinho, Ilhéus, Bahia, Brazil; Tropical Herpetology Laboratory, Department of Biological Sciences, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16, 45662-900 Salobrinho, Ilhéus, Bahia, Brazil. https://twitter.com/Brunocarvalhoi
| | - Mirco Solé
- Tropical Herpetology Laboratory, Department of Biological Sciences, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16, 45662-900 Salobrinho, Ilhéus, Bahia, Brazil; Museum Koenig Bonn, Leibniz Institute for the Analysis of Biodiversity Change, Adenauerallee 127, 53113 Bonn, Germany.
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Daza JD, Chiari Y, Daza-Herrera E, Glaberman MS, Glaberman S, Heide OA, Herrera-Martínez A, Thomas R. A rare case of caudal bifurcation in a miniaturized gecko from Puerto Rico. Anat Rec (Hoboken) 2023; 306:688-691. [PMID: 35791962 DOI: 10.1002/ar.25034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/13/2022] [Accepted: 06/17/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Juan D Daza
- Department of Biological Sciences, Sam Houston State University, Huntsville, Texas, USA
| | - Ylenia Chiari
- Department of Biology, George Mason University, Manassas, Virginia, USA
| | - Emilia Daza-Herrera
- Scott Johnson Elementary and Huntsville Intermediate School, Huntsville, Texas, USA
| | | | - Scott Glaberman
- Department of Environmental Science and Policy, George Mason University, Fairfax, Virginia, USA
| | - Olivia A Heide
- Department of Biological Sciences, Sam Houston State University, Huntsville, Texas, USA
| | | | - Richard Thomas
- Biology Department, University of Puerto Rico, Río Piedras Campus, Río Piedras, Puerto Rico
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Oliveira CN, Campos IHMP, Provete DB, Guarnieri MC, Ribeiro SC. Defensive behaviour and tail autotomy in Coleodactylus meridionalis (Squamata: Sphaerodactylidae). J NAT HIST 2021. [DOI: 10.1080/00222933.2020.1840641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Camila N. Oliveira
- Departamento de Zoologia, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - Ikaro H. M. P. Campos
- Departamento de Zoologia, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - Diogo B. Provete
- Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Campo Grande, Brazil
| | - Míriam C. Guarnieri
- Departamento de Zoologia, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - Samuel C. Ribeiro
- Instituto de Formação de Educadores – IFE, Universidade Federal do Cariri – URCA, Campus Brejo Santo, Brazil
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Atencia PL, Castillo CJ, Montes LF. Use of microhabitat and activity patterns of two lizard species from a seasonal dry forest in northern Colombia. NEOTROPICAL BIOLOGY AND CONSERVATION 2020. [DOI: 10.3897/neotropical.15.e49713] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
In this work, the microhabitat use and activity patterns of two lizard species with sympatric distribution were evaluated in a dry forest fragment within the department of Sucre, northern Colombia. Data was collected in May, June, September and October of 2017, using the active search method limited by time (7:00 and 19:00 hours). Substrates used, spatial distribution and time of capture were recorded for individuals of the species Loxopholis rugiceps (Cope 1869) and Lepidoblepharis sanctaemartae (Ruthven 1916). Complementarily, environmental and physical parameters were recorded, which allowed us to characterise the microhabitats of the species. A total of 276 lizards were recorded, 177 belonging to the species Loxopholis rugiceps and 99 to Lepidoblepharis sanctaemartae. The results showed similar resource use by the two species for the spatial dimension, with both exploiting different terrestrial elements mainly from the interior forest, followed by the riverbed stream and forest edge. Differences were found in the daily activity patterns between species, with individuals of L. sanctaemartae more frequently recorded in the morning hours and L. rugiceps in the afternoon hours. The activity patterns did not differ by age groups: juveniles and adults. Both species were more frequently found in the litter substrate within the forest, followed by rocks and bare ground. Our results indicate that both species are tolerant to matrix conditions, however, they require internal forest conditions to exploit food resources and refuge.
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Abstract
We summarize thermal-biology data of 69 species of Amazonian lizards, including mode of thermoregulation and field-active body temperatures (Tb). We also provide new data on preferred temperatures (Tpref), voluntary and thermal-tolerance ranges, and thermal-performance curves (TPC's) for 27 species from nine sites in the Brazilian Amazonia. We tested for phylogenetic signal and pairwise correlations among thermal traits. We found that species generally categorized as thermoregulators have the highest mean values for all thermal traits, and broader ranges for Tb, critical thermal maximum (CTmax) and optimal (Topt) temperatures. Species generally categorized as thermoconformers have large ranges for Tpref, critical thermal minimum (CTmin), and minimum voluntary (VTmin) temperatures for performance. Despite these differences, our results show that all thermal characteristics overlap between both groups and suggest that Amazonian lizards do not fit into discrete thermoregulatory categories. The traits are all correlated, with the exceptions of (1) Topt, which does not correlate with CTmax, and (2) CTmin, and correlates only with Topt. Weak phylogenetic signals for Tb, Tpref and VTmin indicate that these characters may be shaped by local environmental conditions and influenced by phylogeny. We found that open-habitat species perform well under present environmental conditions, without experiencing detectable thermal stress from high environmental temperatures induced in lab experiments. For forest-dwelling lizards, we expect warming trends in Amazonia to induce thermal stress, as temperatures surpass the thermal tolerances for these species.
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Novosolov M, Rodda GH, Gainsbury AM, Meiri S. Dietary niche variation and its relationship to lizard population density. J Anim Ecol 2017; 87:285-292. [PMID: 28944457 DOI: 10.1111/1365-2656.12762] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 09/16/2017] [Indexed: 11/28/2022]
Abstract
Insular species are predicted to broaden their niches, in response to having fewer competitors. They can thus exploit a greater proportion of the resource spectrum. In turn, broader niches are hypothesized to facilitate (or be a consequence of) increased population densities. We tested whether insular lizards have broader dietary niches than mainland species, how it relates to competitor and predator richness, and the nature of the relationship between population density and dietary niche breadth. We collected population density and dietary niche breadth data for 36 insular and 59 mainland lizard species, and estimated competitor and predator richness at the localities where diet data were collected. We estimated dietary niche shift by comparing island species to their mainland relatives. We controlled for phylogenetic relatedness, body mass and the size of the plots over which densities were estimated. We found that island and mainland species had similar niche breadths. Dietary niche breadth was unrelated to competitor and predator richness, on both islands and the mainland. Population density was unrelated to dietary niche breadth across island and mainland populations. Our results indicate that dietary generalism is not an effective way of increasing population density nor is it result of lower competitive pressure. A lower variety of resources on islands may prevent insular animals from increasing their niche breadths even in the face of few competitors.
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Affiliation(s)
- Maria Novosolov
- Department of Zoology, Tel Aviv University, Tel Aviv, Israel
| | - Gordon H Rodda
- Fort Collins Science Center, US Geological Survey, Fort Collins, CO, USA
| | - Alison M Gainsbury
- Department of Biological Sciences, University of South Florida, St. Petersburg, St. Petersburg, FL, USA
| | - Shai Meiri
- Department of Zoology, Tel Aviv University, Tel Aviv, Israel
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Lamb AD, Watkins-Colwell GJ, Moore JA, Warren DL, Iglesias TL, Brandley MC, Dornburg A. Endolymphatic Sac Use and Reproductive Activity in the Lesser Antilles Endemic GeckoGonatodes antillensis(Gekkota: Sphaerodactylidae). BULLETIN OF THE PEABODY MUSEUM OF NATURAL HISTORY 2017. [DOI: 10.3374/014.058.0103] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | | | - Jon A. Moore
- Florida Atlantic University, Wilkes Honors College, Jupiter, FL 33458 USA, and Florida Atlantic University, Harbor Branch Oceanographic Institution, Fort Pierce, FL 34946 USA
| | - Dan L. Warren
- Department of Biological Sciences, Macquarie University, North Ryde, NSW 2109, Australia, and Biocomplexity and Biodiversity Unit, Okinawa Institute of Science and Technology, Okinawa 904-0495 Japan
| | - Teresa L. Iglesias
- Department of Biological Sciences, Macquarie University, North Ryde, NSW 2109, Australia, and Physics and Biology Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa Prefecture 904-0495, Japan
| | | | - Alex Dornburg
- North Carolina Museum of Natural Sciences, Raleigh, NC 27601 USA
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Guerra-Fuentes RA, Daza JD, Bauer AM. The embryology of the retinal pigmented epithelium in dwarf geckos (Gekkota: Sphaerodactylinae): a unique developmental pattern. BMC DEVELOPMENTAL BIOLOGY 2014; 14:29. [PMID: 24974837 PMCID: PMC4227003 DOI: 10.1186/1471-213x-14-29] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Accepted: 06/12/2014] [Indexed: 12/22/2022]
Abstract
Background The retinal pigmented epithelium (RPE) is a rounded shaped structure in almost all lizards. In the New World dwarf geckos, this structure shows an unusual morphology. In addition to this ocular character, we describe notable differences in the development of these geckos in comparison with available developmental staging tables for other geckos and squamate reptiles. Results We identified two main patterns of development of the RPE for squamates. These patterns were mapped onto a metatree of concordant hypotheses of squamates based on molecular data. During post-ovopositional stages the representative species of sphaerodactyls exhibit a RPE layer that transforms gradually from an ovoid form into the generalized spherical form. Sphaerodactyls are the only group of squamates in which this pattern is known. Conclusions This transition might be circumstantial evidence that the accessory RPE plays a role in providing additional protection for their apomorphic concaviclivate temporal fovea. We also report the presence of conjunctival papillae in a developmental stage prior to the formation of scleral ossicles. This developmental progression is similar to that of birds and turtles.
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Affiliation(s)
| | - Juan D Daza
- Biology Department, Villanova University, 800 Lancaster Avenue, Villanova, PA 19085-1699, USA.
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Daza JD, Bauer AM, Snively ED. On the fossil record of the Gekkota. Anat Rec (Hoboken) 2014; 297:433-62. [PMID: 24482344 DOI: 10.1002/ar.22856] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 05/20/2013] [Accepted: 06/09/2013] [Indexed: 11/11/2022]
Abstract
Gekkota is often interpreted as sister to all remaining squamates, exclusive of dibamids, or as sister to Autarchoglossa. It is the only diverse lineage of primarily nocturnal lizards and includes some of the smallest amniotes. The skeleton of geckos has often been interpreted as paedomorphic and/or "primitive" but these lizards also display a wide range of structural specializations of the postcranium, including modifications associated with both scansorial locomotion and limb reduction. Although the concept of "Gekkota" has been variously applied by different authors, we here apply a rigorous apomorphy based definition, recent advances in gekkotan morphology and phylogenetics, and diverse comparative material to provide a comprehensive assessment of 28 known pre-Quaternary geckos, updating the last such review, published three decades ago. Fossils evaluated include both sedimentary fossils and amber-embedded specimens. Known Cretaceous geckos are exclusively Asian and exhibit character combinations not seen in any living forms. Cenozoic gekkotans derive from sites around the world, although Europe is especially well represented. Paleogene geckos are largely known from disarticulated remains and show similarities to Sphaerodactylidae and Diplodactylidae, although resemblances may be plesiomorphic in some cases. Many Neogene gekkotans are referable to living families or even genera, but their geographic occurrences are often extralimital to those of modern groups, as is consistent with paleoclimatic conditions. The phylogenetic placement of fossil gekkotans has important repercusions for timetree calibration, but at present only a small number of fossils can be confidently assigned to even family level groupings, limiting their utility in this regard.
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Affiliation(s)
- Juan D Daza
- Biology Department, Villanova University, Villanova, Pennsylvania
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Kupriyanov V, Daza J, Bauer A, Gaban-Lima R, Rocha-Brito G, Höfling E. Six species of Amazonian Woodcreepers (Aves: Dendrocolaptidae) preying upon lizards and frogs. J NAT HIST 2012. [DOI: 10.1080/00222933.2012.717646] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Lisboa CMCA, Freire EMX. Population Density, Habitat Selection and Conservation ofColeodactylus natalensis(Squamata: Sphaerodactylidae) in an Urban Fragment of Atlantic Forest in Northeastern Brazil. SOUTH AMERICAN JOURNAL OF HERPETOLOGY 2012. [DOI: 10.2994/057.007.0208] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Leclair R, Leclair MH. Life-History Traits in a Population of the Dwarf Gecko, Sphaerodactylus vincenti ronaldi, from a Xerophytic Habitat in Martinique, West Indies. COPEIA 2011. [DOI: 10.1643/ce-09-012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Gamble T, Daza JD, Colli GR, Vitt LJ, Bauer AM. A new genus of miniaturized and pug-nosed gecko from South America (Sphaerodactylidae: Gekkota). Zool J Linn Soc 2011; 163:1244-1266. [PMID: 22125341 PMCID: PMC3223738 DOI: 10.1111/j.1096-3642.2011.00741.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Abstract
Sphaerodactyl geckos comprise five genera distributed across Central and South America and the Caribbean. We estimated phylogenetic relationships among sphaerodactyl genera using both separate and combined analyses of seven nuclear genes. Relationships among genera were incongruent at different loci and phylogenies were characterized by short, in some cases zero length, internal branches and poor phylogenetic support at most nodes. We recovered a polyphyletic Coleodactylus, with Coleodactylus amazonicus being deeply divergent from the remaining Coleodactylus species sampled. The C. amazonicus lineage possessed unique codon deletions in the genes PTPN12 and RBMX while the remaining Coleodactylus species had unique codon deletions in RAG1. Topology tests could not reject a monophyletic Coleodactylus, but we show that short internal branch lengths decreased the accuracy of topology tests because there were not enough data along short branches to support one phylogenetic hypothesis over another. Morphological data corroborated results of the molecular phylogeny, with Coleodactylus exhibiting substantial morphological heterogeneity. We identified a suite of unique craniofacial features that differentiate C. amazonicus not only from other Coleodactylus species, but also from all other geckos. We describe this novel sphaerodactyl lineage as a new genus, Chatogekko gen. nov. We present a detailed osteology of Chatogekko, characterizing osteological correlates of miniaturization that provide a framework for future studies in sphaerodactyl systematics and biology.
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Affiliation(s)
- Tony Gamble
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN 55455, USA
| | - Juan D Daza
- CONICET, Instituto de Herpetología, Fundación Miguel Lillo, San Miguel de Tucuman, Argentina
| | - Guarino R Colli
- Departamento de Zoologia, Universidade de Brasília, Brasília, Distrito Federal, Brazil
| | - Laurie J Vitt
- Sam Noble Oklahoma Museum of Natural History and Department of Zoology, University of Oklahoma, Norman, OK 73072, USA
| | - Aaron M Bauer
- Department of Biology, Villanova University, Villanova, PA 19085, USA
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Ramos-Pallares E, Serrano-Cardozo VH, Ramírez-Pinilla MP. Reproduction ofPtychoglossus bicolor(Squamata: Gymnophthalmidae) in an Andean Coffee Shade Plantation in Colombia. J HERPETOL 2010. [DOI: 10.2994/057.005.0208] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Geurgas SR, Rodrigues MT. The hidden diversity of Coleodactylus amazonicus (Sphaerodactylinae, Gekkota) revealed by molecular data. Mol Phylogenet Evol 2010; 54:583-93. [DOI: 10.1016/j.ympev.2009.10.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2009] [Revised: 09/27/2009] [Accepted: 10/02/2009] [Indexed: 10/20/2022]
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DAZA JUAND, HERRERA ALEXANDRA, THOMAS RICHARD, CLAUDIO HÉCTORJ. Are you what you eat? A geometric morphometric analysis of gekkotan skull shape. Biol J Linn Soc Lond 2009. [DOI: 10.1111/j.1095-8312.2009.01242.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Moen DS, Wiens JJ. PHYLOGENETIC EVIDENCE FOR COMPETITIVELY DRIVEN DIVERGENCE: BODY-SIZE EVOLUTION IN CARIBBEAN TREEFROGS (HYLIDAE:OSTEOPILUS). Evolution 2009; 63:195-214. [PMID: 19055679 DOI: 10.1111/j.1558-5646.2008.00538.x] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel S Moen
- Department of Ecology and Evolution, Stony Brook University, Stony Brook, NY 11794-5245, USA.
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Daza JD, Abdala V, Thomas R, Bauer AM. Skull anatomy of the miniaturized gecko Sphaerodactylus roosevelti (Squamata: Gekkota). J Morphol 2008; 269:1340-64. [PMID: 18698607 DOI: 10.1002/jmor.10664] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A detailed description of the skull and jaw of the gecko Sphaerodactylus roosevelti is presented. The bones are described articulated and isolated with special consideration given to the type of suture among joining elements. S. roosevelti was compared with 109 gekkotan species to evaluate the osteological variation and to find characters for cladistic analysis. Changes in the skull associated with the miniaturization process are discussed within the sphaerodactylid geckos. A noticeable increase of overlapping sutures was observed in the snout of the smallest sphaerodactylids compared to other gekkotans. This pattern is convergent with that in miniaturized pygopodids and may be attributed to adaptations for decreasing mechanical resistance of the cranium during feeding or burrowing. New cranial characters support Sphaerodactylinae as a monophyletic group and should be useful for resolving questions such as their relationship with other gekkotans.
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Affiliation(s)
- Juan D Daza
- Biology Department, University of Puerto Rico, San Juan, Puerto Rico 003931-3360.
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Dibble CJ, Smith GR, Lemos-Espinal JA. Diet and Sexual Dimorphism of the Desert Iguana, Dipsosaurus dorsalis, from Sonora, Mexico. WEST N AM NATURALIST 2008. [DOI: 10.3398/1527-0904-68.4.521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Geurgas SR, Rodrigues MT, Moritz C. The genus Coleodactylus (Sphaerodactylinae, Gekkota) revisited: a molecular phylogenetic perspective. Mol Phylogenet Evol 2008; 49:92-101. [PMID: 18588990 DOI: 10.1016/j.ympev.2008.05.043] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Revised: 05/28/2008] [Accepted: 05/30/2008] [Indexed: 10/22/2022]
Abstract
Nucleotide sequence data from a mitochondrial gene (16S) and two nuclear genes (c-mos, RAG-1) were used to evaluate the monophyly of the genus Coleodactylus, to provide the first phylogenetic hypothesis of relationships among its species in a cladistic framework, and to estimate the relative timing of species divergences. Maximum Parsimony, Maximum Likelihood and Bayesian analyses of the combined data sets retrieved Coleodactylus as a monophyletic genus, although weakly supported. Species were recovered as two genetically and morphological distinct clades, with C. amazonicus populations forming the sister taxon to the meridionalis group (C. brachystoma, C. meridionalis, C. natalensis, and C. septentrionalis). Within this group, C. septentrionalis was placed as the sister taxon to a clade comprising the rest of the species, C. meridionalis was recovered as the sister species to C. brachystoma, and C. natalensis was found nested within C. meridionalis. Divergence time estimates based on penalized likelihood and Bayesian dating methods do not support the previous hypothesis based on the Quaternary rain forest fragmentation model proposed to explain the diversification of the genus. The basal cladogenic event between major lineages of Coleodactylus was estimated to have occurred in the late Cretaceous (72.6+/-1.77 Mya), approximately at the same point in time than the other genera of Sphaerodactylinae diverged from each other. Within the meridionalis group, the split between C. septentrionalis and C. brachystoma+C. meridionalis was placed in the Eocene (46.4+/-4.22 Mya), and the divergence between C. brachystoma and C. meridionalis was estimated to have occurred in the Oligocene (29.3+/-4.33 Mya). Most intraspecific cladogenesis occurred through Miocene to Pliocene, and only for two conspecific samples and for C. natalensis could a Quaternary differentiation be assumed (1.9+/-1.3 Mya).
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Affiliation(s)
- Silvia Rodrigues Geurgas
- Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, 05508-090, São Paulo, SP, Brazil.
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Smith GR, Lemos-Espinal JA, Dibble CJ, Iverson JP. Natural History of Procinura aemula (Serpentes: Colubridae) From Chínipas, Chihuahua, Mexico. SOUTHWEST NAT 2008. [DOI: 10.1894/0038-4909(2008)53[261:nhopas]2.0.co;2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Macedo LC, Bernarde PS, Abe AS. Lagartos (Squamata: Lacertilia) em áreas de floresta e de pastagem em Espigão do Oeste, Rondônia, sudoeste da Amazônia, Brasil. BIOTA NEOTROPICA 2008. [DOI: 10.1590/s1676-06032008000100016] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
O presente estudo apresenta dados sobre riqueza e freqüência de captura de lagartos em áreas de floresta e pastagem em uma localidade em Rondônia (sudoeste da Amazônia) utilizando três métodos de amostragem: armadilhas de interceptação e queda, procura noturna limitada por tempo (encontro de espécimes dormindo sobre a vegetação) e encontros ocasionais. Foram encontradas 29 espécies distribuídas em nove famílias. A maioria das espécies (28) foi encontrada em floresta, enquanto que na pastagem foram encontradas oito. A maioria das espécies foi registrada pelas armadilhas de interceptação e queda (22), seguido pelos encontros ocasionais (16) e procura noturna (9). A curva do coletor apresentando dados de todos os métodos mostra que a partir do oitavo mês de amostragem não houve mais nenhum acréscimo de nova espécie nessa comunidade, evidenciando que a mesma foi bem amostrada. O fato de algumas espécies terem sido coletadas exclusivamente em apenas um dos métodos, demonstra a importância de se usar dois ou mais métodos de amostragem em estudos sobre comunidades. Essa redução de espécies se deve a retirada da cobertura vegetal e, possivelmente, às suas conseqüências: aumento das taxa de predação e de competição, dificuldades para a termo-regulação, perda de locais para abrigos e reprodução, diminuição dos recursos alimentares e perda de serapilheira.
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