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- W2022126856 abstract "Abstract The Neotropical crocodylian species, Caiman crocodilus , is widely distributed through Mesoamerica, northern South America, and the Amazon basin. Four subspecies are recognized within C. crocodilus , suggesting some geographic variation in morphology. In this study, we utilized mitochondrial DNA (mtDNA) sequence data from 45 individuals of C. crocodilus throughout its range to infer its evolutionary history and population structure, as well as to evaluate genealogical support for subspecies and their geographic distributions. Our molecular phylogenetic results identified five mtDNA haplotype clades with a mean sequence divergence of 3.4%, indicating considerable evolutionary independence among phylogeographic lineages. Our results were also broadly consistent with current subspecific taxonomy, with some important additional findings. First, we found substantial genetic structuring within C. c. fuscus from southern Mesoamerica. Second, though we confirmed the existence of a widespread Amazonian clade, we also discovered a cryptic and divergent mtDNA lineage that was indistinguishable from C. c. crocodilus based on external morphology. Third, we confirm the status of C. c. chiapasius as a distinct evolutionary lineage, and provide evidence that C. c. fuscus may be moving northward and hybridizing with C. c. chiapasius in northern Mesoamerica. Finally, our results parallel previous phylogeographic studies of other organisms that have demonstrated significant genetic structure over shorter geographic distances in Mesoamerica compared with Amazonia. We support conservation efforts for all five independent lineages within C. crocodilus , and highlight the subspecies C. c. chiapasius as a unit of particular conservation concern. J. Exp. Zool. 309A:614–627, 2008 . © 2008 Wiley‐Liss, Inc." @default.
- W2022126856 created "2016-06-24" @default.
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- W2022126856 date "2008-10-01" @default.
- W2022126856 modified "2023-10-18" @default.
- W2022126856 title "Mitochondrial DNA phylogeography of<i>Caiman crocodilus</i>in Mesoamerica and South America" @default.
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- W2022126856 doi "https://doi.org/10.1002/jez.502" @default.
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