Conservation genetics, evolution and distinct population segments of the Mojave fringe-toed lizard, Uma scoparia

Murphy, Robert W.; Trépanier, T.L.; Morafka, David J.

doi:10.1016/j.jaridenv.2006.09.023

Cited by 20 publications

(24 citation statements)

References 65 publications

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“…Overall, our analysis of C. occipitalis mitochondrial genetic variation appears to produce results superficially concordant to intraspecific variation observed in many other Mojave/Sonoran codistributed reptiles (i.e. Crotalus, Douglas et al 2006;Sceloporus magister, Schulte et al 2006; Uma scoparia and Uma notata, Trépanier and Murphy 2001;Murphy et al 2007). In particular, mtDNA analyses of two species of rattlesnakes in the desert southwest (i.e.…”

Section: Phylogeographysupporting

confidence: 86%

“…The biogeographic history of arid adapted taxa in the desert southwest is complex, and evidence for multiple biotic refugia within this region is an increasingly common phenomenon (Van Devender et al 1987;Douglas et al 2006;Murphy et al 2007). Overall, our analysis of C. occipitalis mitochondrial genetic variation appears to produce results superficially concordant to intraspecific variation observed in many other Mojave/Sonoran codistributed reptiles (i.e.…”

Section: Phylogeographymentioning

confidence: 99%

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Molecular and phenotypic diversity in Chionactis occipitalis (Western Shovel-nosed Snake), with emphasis on the status of C. o. klauberi (Tucson Shovel-nosed Snake).

et al. 2007

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Chionactis occipitalis (Western Shovel-nosed Snake) is a small colubrid snake inhabiting the arid regions of the Mojave, Sonoran, and Colorado deserts. Morphological assessments of taxonomy currently recognize four subspecies. However, these taxonomic proposals were largely based on weak morphological differentiation and inadequate geographic sampling. Our goal was to explore evolutionary relationships and boundaries among subspecies of C. occipitalis, with particular focus on individuals within the known range of C. o. klauberi (Tucson Shovelnosed snake). Population sizes and range for C. o. klauberi have declined over the last 25 years due to habitat alteration and loss prompting a petition to list this subspecies as endangered. We examined the phylogeography, population structure, and subspecific taxonomy of C. occipitalis across its geographic range with genetic analysis of 1100 bases of mitochondrial DNA sequence and reanalysis of 14 morphological characters from 1543 museum specimens. We estimated the species gene phylogeny from 81 snakes using Bayesian inference and explored possible factors influencing genetic variation using landscape genetic analyses. Phylogenetic and population genetic analyses reveal genetic isolation and independent evolutionary trajectories for two primary clades. Our data indicate that diversification between these clades has developed as a result of both historical vicariance and environmental isolating mechanisms. Thus these two clades likely comprise 'evolutionary significant units' (ESUs). Neither molecular nor morphological data are concordant with the traditional C. occipitalis subspecies taxonomy. Mitochondrial sequences suggest specimens recognized as C. o. klauberi are embedded in a larger geographic clade whose range has expanded from western Arizona populations, and these data are concordant with clinal longitudinal variation in morphology.

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Section: Phylogeographysupporting

confidence: 86%

Section: Phylogeographymentioning

confidence: 99%

Molecular and phenotypic diversity in Chionactis occipitalis (Western Shovel-nosed Snake), with emphasis on the status of C. o. klauberi (Tucson Shovel-nosed Snake).

et al. 2007

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“…Uma scoparia is a habitat specialist that occurs only in wind-blown sandy soils (Robinson & Barrows 2013) and is a "Species of Special Concern" in the state of California (Murphy et al 2006). In Arizona, they are listed by AGFD as a "Species of Greatest Conservation Need" tier 1B because of concerns related to their disjunct distribution and fragmentation (AGFD 2012).…”

Section: Hibbitts Et Al 2013)mentioning

confidence: 99%

“…There are four known species of Uma in the United States of America (Crother et al 2012), and of these, two are known to occur in Arizona (Brennan & Holycross 2006). Because these psammophilic lizards are threatened by habitat fragmentation and loss of eolian sand connectivity, they are species of greatest conservation need; however, they are locally data deficient and are high priority for land management agencies throughout their range in the USA and Mexico (Murphy et al 2006). Of the species of Uma found in the USA, U. scoparia Cope, 1894 (Mohave Fringe-toed Lizard) is the northernmost member.…”

mentioning

confidence: 99%

“…The distribution of U. scoparia fits strictly within sandy soils in the USA and ranges from isolated dunes in the northern Mohave Desert in California to its southern boundary along the San Bernardino Mountains. To the west, the distribution is marked by two extirpated populations west of Barstow, California (Murphy et al 2006) and to the east they are known near Parker, Arizona, not far from the Colorado River (Elvin 1960). …”

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confidence: 99%

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The geographic range of Uma scoparia Cope, 1894 (Squamata: Phrynosomatidae) in Arizona

Leavitt¹,

Crumbo²,

Myrand³

et al. 2017

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Surveys dedicated to better describing the distribution of Uma scoparia in Arizona are reported. These extend this species' distribution in La Paz County, Arizona, 20 km further to the south than previously described. Six records on the outside of a confused range are presented alongside data from 170 captures within this range. This species is well known from California but its Arizona distribution is little understood and less well studied than other members of its genus. Concern about the conservation status of the disjunct Arizona population makes this report valuable to resource managers. Lizards were observed with ease and in large numbers at nearly all sites surveyed.

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Speciation, population structure, and demographic history of the Mojave Fringe‐toed Lizard (Uma scoparia), a species of conservation concern

Gottscho

Marks

Jennings

2014

Ecology and Evolution

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The North American deserts were impacted by both Neogene plate tectonics and Quaternary climatic fluctuations, yet it remains unclear how these events influenced speciation in this region. We tested published hypotheses regarding the timing and mode of speciation, population structure, and demographic history of the Mojave Fringe-toed Lizard (Uma scoparia), a sand dune specialist endemic to the Mojave Desert of California and Arizona. We sampled 109 individual lizards representing 22 insular dune localities, obtained DNA sequences for 14 nuclear loci, and found that U. scoparia has low genetic diversity relative to the U. notata species complex, comparable to that of chimpanzees and southern elephant seals. Analyses of genotypes using Bayesian clustering algorithms did not identify discrete populations within U. scoparia. Using isolation-with-migration (IM) models and a novel coalescent-based hypothesis testing approach, we estimated that U. scoparia diverged from U. notata in the Pleistocene epoch. The likelihood ratio test and the Akaike Information Criterion consistently rejected nested speciation models that included parameters for migration and population growth of U. scoparia. We reject the Neogene vicariance hypothesis for the speciation of U. scoparia and define this species as a single evolutionarily significant unit for conservation purposes.

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Conservation genetics, evolution and distinct population segments of the Mojave fringe-toed lizard, Uma scoparia

Cited by 20 publications

References 65 publications

Molecular and phenotypic diversity in Chionactis occipitalis (Western Shovel-nosed Snake), with emphasis on the status of C. o. klauberi (Tucson Shovel-nosed Snake).

Molecular and phenotypic diversity in Chionactis occipitalis (Western Shovel-nosed Snake), with emphasis on the status of C. o. klauberi (Tucson Shovel-nosed Snake).

The geographic range of Uma scoparia Cope, 1894 (Squamata: Phrynosomatidae) in Arizona

Speciation, population structure, and demographic history of the Mojave Fringe‐toed Lizard (Uma scoparia), a species of conservation concern

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