Phylogenetic Placement of the Pygmy Alligator Lizard Based on Mitochondrial DNA

Conroy, Chris J.; Bryson, Robert W.; Lazcano, David; Knight, Alec

doi:10.1670/0022-1511(2005)039[0142:ppotpa]2.0.co;2

Cited by 18 publications

(16 citation statements)

References 7 publications

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“…Some of these problems were not reported previously (e.g. Coloptychon, Abronia , and Mesaspis ), due to incomplete taxon sampling in previous studies [129,132,133], but relationships within Gerrhonotinae are under detailed investigation by other researchers, so these issues are likely to be resolved in the near future.…”

Section: Resultsmentioning

confidence: 91%

A phylogeny and revised classification of Squamata, including 4161 species of lizards and snakes

2013

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BackgroundThe extant squamates (>9400 known species of lizards and snakes) are one of the most diverse and conspicuous radiations of terrestrial vertebrates, but no studies have attempted to reconstruct a phylogeny for the group with large-scale taxon sampling. Such an estimate is invaluable for comparative evolutionary studies, and to address their classification. Here, we present the first large-scale phylogenetic estimate for Squamata.ResultsThe estimated phylogeny contains 4161 species, representing all currently recognized families and subfamilies. The analysis is based on up to 12896 base pairs of sequence data per species (average = 2497 bp) from 12 genes, including seven nuclear loci (BDNF, c-mos, NT3, PDC, R35, RAG-1, and RAG-2), and five mitochondrial genes (12S, 16S, cytochrome b, ND2, and ND4). The tree provides important confirmation for recent estimates of higher-level squamate phylogeny based on molecular data (but with more limited taxon sampling), estimates that are very different from previous morphology-based hypotheses. The tree also includes many relationships that differ from previous molecular estimates and many that differ from traditional taxonomy.ConclusionsWe present a new large-scale phylogeny of squamate reptiles that should be a valuable resource for future comparative studies. We also present a revised classification of squamates at the family and subfamily level to bring the taxonomy more in line with the new phylogenetic hypothesis. This classification includes new, resurrected, and modified subfamilies within gymnophthalmid and scincid lizards, and boid, colubrid, and lamprophiid snakes.

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Section: Resultsmentioning

confidence: 91%

A phylogeny and revised classification of Squamata, including 4161 species of lizards and snakes

2013

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“…We sampled 181 individuals from the major geographical regions the taxon occupies, including all four subspecies and intergrade zones (Table ; Figure ). For outgroups, we selected Elgaria panamintina , Elgaria kingii and Elgaria paucicarinata , based on previous Elgaria phylogenies (Conroy, Bryson, Lazcano, & Knight, ; Feldman & Spicer, ; Leavitt, Marion, Hollingsworth, & Reeder, ; Macey et al, ).…”

Section: Methodsmentioning

confidence: 99%

Phylogeography of the Northern Alligator Lizard (Squamata, Anguidae): Hidden diversity in a western endemic

et al. 2018

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Western North America includes the California Floristic Province and the Pacific Northwest, biologically diverse regions highlighted by a complex topography, geology, climate and history. A number of animals span these regions and show distinctive patterns of dispersal, vicariance and lineage diversification. Examining phylogeographic patterns in the fauna of this area aids in our understanding of the forces that have contributed to the generation and maintenance of regional biodiversity. Here, we investigate the biogeography and population structure of the Northern Alligator Lizard (Elgaria coerulea), a wide-ranging anguid endemic to western North America. We sequenced two mtDNA fragments (ND2 and ND4) for 181 individuals across the range of the species and analysed these data with phylogenetic approaches to infer population and biogeographic history, and date major divergences within the taxon. We further used Bayesian clustering methods to assess major patterns of population structure and performed ecological niche modelling (ENM) to aid in our interpretation of geographic structure and diversification of E. coerulea lineages. Our phylogeographic examination of E. coerulea uncovered surprising diversity and structure, recovering 10 major lineages, each with substantial geographic substructure. While some divergences within the species are relatively old (Pliocene, 5.3-2.6 mya), most intraspecific variation appears to be of more recent origin (Pleistocene, 2.6 mya-11,700 ya). Current diversity appears to have arisen in the Sierra Nevada Mountains and spread west and north since the Pliocene. Finally, our ENMs suggest that much of the Coast Ranges in California provided ideal habitat during the Last Glacial Maxima (LGM) that has since contracted dramatically and shifted northwards, whereas significant portions of the Sierra Nevada were unsuitable during theLGM and have since become more suitable. Interestingly, E. coerulea shares a number of genetic boundaries with other sympatric taxa, suggesting common historical events and geomorphological features have shaped the biota of this region. K E Y W O R D Salligator lizard,

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“…Sequences from an additional two samples were obtained from GenBank (Table 1) to fill in small gaps in the distribution. We used Elgaria kingii and Abronia graminea as outgroups (Macey et al ., 1999; Conroy et al ., 2005).…”

Section: Methodsmentioning

confidence: 99%

Tracing the origins of widespread highland species: a case of Neogene diversification across the Mexican sierras in an endemic lizard

Bryson

Riddle

2011

Biological Journal of the Linnean Society

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The evolutionary history of the Mexican sierras has been shaped by various geological and climatic events over the past several million years. The relative impacts of these historical events on diversification in highland taxa, however, remain largely uncertain owing to a paucity of studies on broadly-distributed montane species. We investigated the origins of genetic diversification in widely-distributed endemic alligator lizards in the genus Barisia to help develop a better understanding of the complex processes structuring biological diversity in the Mexican highlands. We estimated lineage divergence dates and the diversification rate from mitochondrial DNA sequences, and combined divergence dates with reconstructions of ancestral geographical ranges to track lineage diversification across geography through time. Based on our results, we inferred ten geographically structured, well supported mitochondrial lineages within Barisia. Diversification of a widely-distributed ancestor appears tied to the formation of the Trans-Mexican Volcanic Belt across central Mexico during the Miocene and Pliocene. The formation of filter barriers such as major river drainages may have later subdivided lineages. The results of the present study provide additional support for the increasing number of studies that suggest Neogene events heavily impacted genetic diversification in widespread montane taxa.

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Phylogenetic Placement of the Pygmy Alligator Lizard Based on Mitochondrial DNA

Cited by 18 publications

References 7 publications

A phylogeny and revised classification of Squamata, including 4161 species of lizards and snakes

A phylogeny and revised classification of Squamata, including 4161 species of lizards and snakes

Phylogeography of the Northern Alligator Lizard (Squamata, Anguidae): Hidden diversity in a western endemic

Tracing the origins of widespread highland species: a case of Neogene diversification across the Mexican sierras in an endemic lizard

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