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Robert Alexander Pyron
George Washington University
11Publications
4H-index
198Citations
Publications 11
Newest
#1Omar Hernández-Ordóñez (UNAM: National Autonomous University of Mexico)H-Index: 4
#2Bráulio A. Santos (UFPB: Federal University of Paraíba)H-Index: 17
Last.Víctor Hugo Reynoso (UNAM: National Autonomous University of Mexico)H-Index: 7
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#1Seenapuram Palaniswamy Vijayakumar (IISc: Indian Institute of Science)H-Index: 1
#2Robert Alexander Pyron (GW: George Washington University)H-Index: 4
Last.Kartik Shanker (IISc: Indian Institute of Science)H-Index: 17
view all 9 authors...
The Western Ghats (WG) is an escarpment on the west coast of Peninsular India, housing one of the richest assemblages of frogs in the world, with three endemic families. Here, we report the discovery of a new ancient lineage from a high-elevation massif in the Wayanad Plateau of the southern WG. Phylogenetic analysis reveals that the lineage belongs to Natatanura and clusters with Nyctibatrachidae, a family endemic to the WG/Sri Lanka biodiversity hotspot. Based on geographic distribution, uniqu...
1 CitationsSource
#1Robert Alexander Pyron (GW: George Washington University)H-Index: 4
#2Ruchira Somaweera (CSIRO: Commonwealth Scientific and Industrial Research Organisation)H-Index: 10
A recent paper dealing with the systematics of Uropeltidae (Pyron et al . 2016) made several taxonomic changes affecting Sri Lankan species in the genera Platyplectrurus Gunther, 1868; Pseudotyphlops Schlegel, 1839; Rhinophis Hemprich, 1820; and Uropeltis Cuvier, 1829. Space precluded a full discussion of those changes, for which there was a wealth of additional photographs, data, and references. Here, we expand on those alterations and provide further justification with reference to the ICZN (1...
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#1Derek B. Tucker (UWF: University of West Florida)H-Index: 4
#2Stephen Blair Hedges (TU: Temple University)H-Index: 1
Last.Jack W. Sites (BYU: Brigham Young University)H-Index: 39
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The phylogenetic relationships and biogeographic history of Caribbean island ameivas (Pholidoscelis) are not well-known because of incomplete sampling, conflicting datasets, and poor support for many clades. Here, we use phylogenomic and mitochondrial DNA datasets to reconstruct a well-supported phylogeny and assess historical colonization patterns in the group. We obtained sequence data from 316 nuclear loci and one mitochondrial marker for 16 of 19 extant species of the Caribbean endemic genus...
3 CitationsSource
#1Robert Alexander Pyron (GW: George Washington University)H-Index: 4
#2S. R. GaneshH-Index: 4
Last.Ruchira Somaweera (CSIRO: Commonwealth Scientific and Industrial Research Organisation)H-Index: 10
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We present a catalogue and systematic overview of Uropeltidae Muller, 1832 based on both new and previously published molecular and morphological data, and a new molecular phylogenetic analysis. We support the monophyly and distinctiveness of Brachyophidium Wall, 1921, Melanophidium Gunther, 1864, Platyplectrurus Gunther, 1868, Pseudoplectrurus Boulenger, 1890, and Teretrurus Beddome, 1886. We move Uropeltis melanogaster (Gray, 1858), U. phillipsi (Nicholls, 1929), and Pseudotyphlops Schlegel, 1...
2 CitationsSource
#1Amit SayyedH-Index: 2
#2Robert Alexander Pyron (GW: George Washington University)H-Index: 4
Last.Neelesh Dahanukar (IISc: Indian Institute of Science)H-Index: 10
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Cnemaspis flaviventralis , a new species of day gecko, is described from the forests of Amboli, Sindhudurg District, Maharashtra State, northern Western Ghats, India. The new species was previously confused with the sympatric species Cnemaspis girii , C. indraneildasii, C. kolhapurensis and C. goaensis. It is distinguished from C. giri by having spine-like tubercles on flanks, granular dorsal scales intermixed with large, depressed, slightly keeled scales (vs. lack of spine-like tubercles on fla...
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#1Ricardo Betancur-R. (UPR-RP: University of Puerto Rico, Río Piedras)H-Index: 19
#2Guillermo Ortí (GW: George Washington University)H-Index: 46
Last.Robert Alexander Pyron (GW: George Washington University)H-Index: 4
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The marine-freshwater boundary is a major biodiversity gradient and few groups have colonised both systems successfully. Fishes have transitioned between habitats repeatedly, diversifying in rivers, lakes and oceans over evolutionary time. However, their history of habitat colonisation and diversification is unclear based on available fossil and phylogenetic data. We estimate ancestral habitats and diversification and transition rates using a large-scale phylogeny of extant fish taxa and one con...
63 CitationsSource
#1Jéssica Fenker (UnB: University of Brasília)H-Index: 4
#2Leonardo G. Tedeschi (UnB: University of Brasília)H-Index: 2
Last.Cristiano Nogueira (UnB: University of Brasília)H-Index: 19
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Aim To analyze impacts of habitat loss on evolutionary diversity and to test widely used biodiversity metrics as surrogates for phylogenetic diversity, we study spatial and taxonomic patterns of phylogenetic diversity in a wide-ranging endemic Neotropical snake lineage. Location South America and the Antilles. Methods We updated distribution maps for 41 taxa, using species distribution models and a revised presence-records database. We estimated evolutionary distinctiveness (ED) for each taxon u...
17 CitationsSource
#1Robert Alexander Pyron (GW: George Washington University)H-Index: 4
#2Van WallachH-Index: 8
The blindsnake superfamily Typhlopoidea (Gerrhopilidae, Typhlopidae, and Xenotyphlopidae) is a diverse, widespread part of the global snake fauna. A recent systematic revision based on molecular phylogenetic analyses and some morphological evidence presented a preliminary solution to the non-monophyly of many previously recognized genera, but additional clarification is needed regarding the recognition of some species and genera. We rectify these problems here with a new molecular phylogenetic a...
17 CitationsSource
#2Van WallachH-Index: 8
FIGURE 3. Approximate distribution maps for species from 7 of 19 typhlopoid genera: Grypotyphlops, Letheobia, Lemuriatyphlops, Cyclotyphlops, Acutotyphlops, Afrotyphlops, and Ramphotyphlops.
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