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46 results for “Phrynosomatidae”
FIGURE 5 in A new species of Sceloporus of the torquatus group (Reptilia: Phrynosomatidae) from West Mexico
FIGURE 5. Photograph of a juvenile paratype of Sceloporus huichol sp. nov. (UTA R-55432), SVL 31.6 mm.
FIGURE 5. Principal components analysis depicting morphometric variables distinguishing northern subspecies, H. l in Phylogenetic structure of Holbrookia lacerata (Cope 1880) (Squamata: Phrynosomatidae): one species or two?
FIGURE 5. Principal components analysis depicting morphometric variables distinguishing northern subspecies, H. l. lacerata (green), from southern subspecies, H. l. subcaudalis (purple).
FIGURE 9 in Phylogenetic structure of Holbrookia lacerata (Cope 1880) (Squamata: Phrynosomatidae): one species or two?
FIGURE 9. Dorsal (top) and ventral (bottom) views of Tamaulipan Spot-tailed Earless Lizard (Holbrookia subcaudalis) holotype specimen collected by Ralph W. Axtell on 6 June 1955 and housed at Texas Natural History Collection, University of Texas (TNHC 20000).
FIGURE 1 in Phylogenetic structure of Holbrookia lacerata (Cope 1880) (Squamata: Phrynosomatidae): one species or two?
FIGURE 1. The shaded portion of the map depicts the historical distribution of Holbrookia lacerata (IUCN). The green and red triangles are localities for the historically divided northern (H. l. lacerata) and southern (H. l. subcaudalis) subspecies, respectively. The samples collected for this study are depicted as red or green circles. The orange line represents the Balcones Escarpment. The photograph outlined in red is a male Holbrookia subcaudalis from Jim Wells County, Texas and the photograph outlined in green is a male H. lacerata from Schleicher County, Texas. Photographs by Toby J. Hibbitts.
FIGURE 8 in Phylogenetic structure of Holbrookia lacerata (Cope 1880) (Squamata: Phrynosomatidae): one species or two?
FIGURE 8. Dorsal (top) and ventral (bottom) views of Plateau Spot-tailed Earless Lizard (Holbrookia lacerata) lectotype specimen collected by G.W. Marnock in May 1879 and housed at Smithsonian (USNM 10160).
FIGURE 7. Histograms showing D in Phylogenetic structure of Holbrookia lacerata (Cope 1880) (Squamata: Phrynosomatidae): one species or two?
FIGURE 7. Histograms showing D statistic from randomization tests for niche equivalency (A) and background similarity (B). Red diamond pointer shows D statistic position along x-axis.
FIGURE 3 in Phylogenetic structure of Holbrookia lacerata (Cope 1880) (Squamata: Phrynosomatidae): one species or two?
FIGURE 3. The map depicts the locations of tissue samples used in the analysis. In all cases the northern species (Holbrookia lacerata) is green. The southwestern population of the southern species (Holbrookia subcaudalis) is red and the southeastern population of the southern species is blue. Median-joining network (left) of the observed 38 haplotypes for ND2 mtDNA gene sequences of 66 spot-tailed earless lizard individuals. Circle sizes are proportional to frequencies of haplotypes. Black circles indicate missing intermediates (unsampled). Cross-hatches represent mutational steps with all greater than four denoted by the number of steps. Bayesian analysis of the mtDNA ND2 gene (right). Numbers at the nodes are posterior probability values. Asterisks indicate values = 1.
FIGURE 6 in Phylogenetic structure of Holbrookia lacerata (Cope 1880) (Squamata: Phrynosomatidae): one species or two?
FIGURE 6. Projections for Maxent models into geographic space. The southwestern border between Texas and Mexico is shown as a black segmented line. The color gradient in each panel is identical, ranges from 0 to 0.8, and shows the raw Maxent values (higher values indicate higher suitability for each population). A) Projection of the Maxent model for Holbrookia lacerata lacerata shows there is no suitable habitat where H. l. subcaudalis occur. Holbrookia l. subcaudalis are indicated with the black plus sign. B) Projection of the Maxent model for the H. l. subcaudalis shows there is little suitable habitat where H. l. lacerata occur. Holbrookia l. lacerata are indicated with the black plus sign.
FIGURE 4 in Phylogenetic structure of Holbrookia lacerata (Cope 1880) (Squamata: Phrynosomatidae): one species or two?
FIGURE 4. Median-joining network (left) of the observed 36 haplotypes for RAG-1 nuclear DNA gene of 66 spottailed earless lizard individuals. Black circles indicate missing intermediates (unsampled). Cross-hatches represent mutational steps with all greater than four denoted by the number of steps. Bayesian analysis of the nuclear DNA RAG-1 gene (right). Numbers at the nodes are posterior probability values. Asterisks indicate values = 1.
FIGURE 2 in Phylogenetic structure of Holbrookia lacerata (Cope 1880) (Squamata: Phrynosomatidae): one species or two?
FIGURE 2. Morphological characters used to distinguish northern and southern subspecies from one another. The two images on the left are from a single northern (H. l. lacerata) male (dorsal and ventral view). The two images on the right are from a single southern (H. l. subcaudalis) female (dorsal and ventral view).
FIGURE 1 in Molecular phylogeny of the Sceloporus torquatus species-group (Squamata: Phrynosomatidae)
FIGURE 1. Distribution of Sceloporus torquatus species-group in México, south of United States of America and Guatemala, based on Smith 1938, Wiens et al. (1999) and museum data. Dots represents localities sampled for this study and those reported for each specimens included from GenBank. Numbers represents the taxa included in the analyses: 1. S. bulleri; 2. S. cyanogenys; 3. S. cyanostictus; 4. S. dugesii dugesii; 5. S. d. intermedius; 6. S. insignis; 7. S. jarrovii; 8. S. lineolateralis; 9. S. macdougalli; 10. S. minor; 11. S. mucronatus aureolus; 12. S. mucronatus mucronatus; 13. S. mucronatus omiltemanus; 14. S. oberon; 15. S. ornatus caeruleus; 16. S. ornatus ornatus; 17. S. poinsettii; 18. S. serrifer plioporus; 19. S. serrifer prezygus; 20. S. serrifer serrifer; 21. S. sugillatus; 22. S. torquatus binocularis; 23. S. torquatus melanogaster; 24. S. torquatus torquatus; Sceloporus sp. 1; 26. Sceloporus sp. 2. The abbreviations means: In United States of America: AZ.= Arizona, NM.= New Mexico, TX.= Texas; In Mexico: CHIS.= Chiapas, COAH.= Coahuila, NL.= Nuevo Leon, TMPS.= Tamaulipas VER.= Veracruz and YUC.= Ycatan.
FIGURE 3 in Molecular phylogeny of the Sceloporus torquatus species-group (Squamata: Phrynosomatidae)
FIGURE 3. Bayesian inference tree based on 12S 16S and ND4 mtDNA sequences. Posterior probabilities> 50% and boostrap proportions> 50 % (from the parsimony analysis) are indicated above and below the branches, respectively.
FIGURE 2 in Molecular phylogeny of the Sceloporus torquatus species-group (Squamata: Phrynosomatidae)
FIGURE 2. Srict consensus of 30 trees from the parsimony analysis based on 12S 16S and ND4 mtDNA sequences (length=2254, CI=0.524, RI=0.733). Bootstrap proportions> 50 % are indicated above the branches.
Cryptic diversity across the Trans-Mexican Volcanic Belt of Mexico in the montane bunchgrass lizard Sceloporus subniger (Squamata: Phrynosomatidae)
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Data from: Species delimitation using Bayes factors: simulations and application to the Sceloporus scalaris species group (Squamata: Phrynosomatidae)
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Data from: Cryptic diversity and discordance in single-locus species delimitation methods within horned lizards (Phrynosomatidae: Phrynosoma)
Biodiversity reduction and loss continues to progress at an alarming rate, and thus there is widespread interest in utilizing rapid and efficient methods for quantifying and delimiting taxonomic diversity. Single-locus species-delimitation methods have become popular, in part due to the adoption of the DNA barcoding paradigm. These techniques can be broadly classified into tree-based and distance-based methods depending on whether species are delimited based on a constructed genealogy. Although the relative performance of these methods has been tested repeatedly with simulations, additional studies are needed to assess congruence with empirical data. We compiled a large data set of mitochondrial ND4 sequences from horned lizards (Phrynosoma) to elucidate congruence using four tree-based (single-threshold GMYC, multiple-threshold GMYC, bPTP, mPTP) and one distance-based (ABGD) species delimitation models. We were particularly interested in cases with highly uneven sampling and/or large differences in intraspecific diversity. Results showed a high degree of discordance among methods, with multiple-threshold GMYC and bPTP suggesting an unrealistically high number of species (29 and 26 species within the P. douglasii complex alone). The single-threshold GMYC model was the most conservative, likely a result of difficulty in locating the inflection point in the genealogies. mPTP and ABGD appeared to be the most stable across sampling regimes and suggested the presence of additional cryptic species that warrant further investigation. These results suggest that the mPTP model may be preferable in empirical data sets with highly uneven sampling or large differences in effective population sizes of species.
FIGURE 6 in A new species of bunchgrass lizard (Squamata: Phrynosomatidae) from the southern sky islands of the Sierra Madre Occidental, Mexico
FIGURE 6. Male paratype Sceloporus aurantius sp. nov. (MZFC 24818) from southern Zacatecas.
FIGURE 2 in A new species of Sceloporus of the torquatus group (Reptilia: Phrynosomatidae) from West Mexico
FIGURE 2. Geographic distribution of Sceloporus huichol sp. nov. in western Mexico.
FIGURE 1 in A new species of Sceloporus of the torquatus group (Reptilia: Phrynosomatidae) from West Mexico
FIGURE 1. Holotype adult ♀ MZFC�20633, Sceloporus huichol sp. nov.
FIGURE 4 in A new species of Sceloporus of the torquatus group (Reptilia: Phrynosomatidae) from West Mexico
FIGURE 4. Photograph of an adult ♀ paratype of Sceloporus huichol sp. nov. (UTA R-55437).
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International Brain Laboratory public data
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OpenNeuro
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