Matthew K Fujita’s research while affiliated with The University of Texas at Arlington and other places

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Publications (2)


Phylogeography supports lineage divergence for an endemic rattlesnake (Crotalus ravus) of the Neotropical montane forest in the Trans-Mexican Volcanic Belt
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July 2022

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The formation of the Trans-Mexican Volcanic Belt (TMVB) and Pleistocene climatic fluctuations have been shown to influence the diversification of lineages and species distributed throughout central Mexico. In some taxa, however, evidence of lineage diversification is not easily recognized, as often is the case in reptiles. Here we present a phylogeographic study on a Mexican endemic rattlesnake species (Crotalus ravus), with the aim of understanding how distinct lineages are distributed across the TMVB. Genetic (mtDNA) and genomic (ddRADseq) data were generated from samples across the species' range to evaluate phylogeographic structure, estimate phylogenetic relationships and divergence times, and perform environmental niche modeling (ENM). Both datasets recover strong phylogeographic structuring of two distinct lineages on an east-west axis, with an estimated Pleistocene divergence (~1.47 Myr). The ENM suggest that the distribution of the two lineages experienced expansion and reduction events throughout recent evolutionary time. We attribute the diversification of C. ravus lineages to geological events associated with the formation of the TMVB, as well as Quaternary climate changes, both of which have been previously recognized in co-distributed taxa in the TMVB. This work emphasizes the existence of cryptic diversification processes in a morphologically conserved species distributed in a region of complex climatic and orogenic heterogeneity. ADDITIONAL KEYWORDS: endemism-mtDNA-phylogepography-snake-SNPs-TMVB.


Phylogeography supports lineage divergence for an endemic rattlesnake ( Crotalus ravus ) of the Neotropical montane forest in the Trans-Mexican Volcanic Belt

July 2022

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404 Reads

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7 Citations

Biological Journal of the Linnean Society

The formation of the Trans-Mexican Volcanic Belt (TMVB) and Pleistocene climatic fluctuations have been shown to influence the diversification of lineages and species distributed throughout central Mexico. In some taxa, however, evidence of lineage diversification is not easily recognized, as often is the case in reptiles. Here we present a phylogeographic study on a Mexican endemic rattlesnake species (Crotalus ravus), with the aim of understanding how distinct lineages are distributed across the TMVB. Genetic (mtDNA) and genomic (ddRADseq) data were generated from samples across the species’ range to evaluate phylogeographic structure, estimate phylogenetic relationships and divergence times, and perform environmental niche modeling (ENM). Both datasets recover strong phylogeographic structuring of two distinct lineages on an east-west axis, with an estimated Pleistocene divergence (~1.47 Myr). The ENM suggest that the distribution of the two lineages experienced expansion and reduction events throughout recent evolutionary time. We attribute the diversification of C. ravus lineages to geological events associated with the formation of the TMVB, as well as Quaternary climate changes, both of which have been previously recognized in co-distributed taxa in the TMVB. This work emphasizes the existence of cryptic diversification processes in a morphologically conserved species distributed in a region of complex climatic and orogenic heterogeneity.

Citations (1)


... In addition, tolerance of a greater range of environmental conditions and greater mobility allow reptiles to have wider distributions than amphibians [46]. Diversification and extinction rates in different biogeographic provinces could also differ between amphibians and reptiles due to each province being more or less isolated, either physically or ecologically, depending on the taxon being considered [47][48][49]. ...

Reference:

The Herpetofauna of the Chihuahuan Desert Biogeographic Province of Mexico: Diversity, Similarity to Other Provinces, and Conservation Status
Phylogeography supports lineage divergence for an endemic rattlesnake ( Crotalus ravus ) of the Neotropical montane forest in the Trans-Mexican Volcanic Belt
  • Citing Article
  • July 2022

Biological Journal of the Linnean Society