Nov 30, 2016

Biology of tiny animals: three new species of minute salamanders (Plethodontidae: Thorius ) from Oaxaca, Mexico

PeerJ
Gabriela Parra-OleaJames Hanken

Abstract

We describe three new species of minute salamanders, genus Thorius, from the Sierra Madre del Sur of Oaxaca, Mexico. Until now only a single species, T. minutissimus, has been reported from this region, although molecular data have long shown extensive genetic differentiation among geographically disjunct populations. Adult Thorius pinicola sp. nov., T. longicaudus sp. nov., and T. tlaxiacus sp. nov. are larger than T. minutissimus and possess elliptical rather than oval nostrils; T. pinicola and T. longicaudus also have longer tails. All three new species occur west of the range of T. minutissimus, which has the easternmost distribution of any member of the genus. The new species are distinguished from each other and from other named Thorius in Oaxaca by a combination of adult body size, external morphology and osteology, and by protein characters (allozymes) and differences in DNA sequences. In addition, we redescribe T. minutissimus and a related species, T. narisovalis, to further clarify the taxonomic status of Oaxacan populations and to facilitate future studies of the remaining genetically differentiated Thorius that cannot be satisfactorily assigned to any named species. Populations of all five species considered here a...Continue Reading

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References

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Citations

Mentioned in this Paper

Genetic Drift
Study
Amphibians
Size
Thorius minutissimus
Longicaudus
Osteology
Science of Morphology
Thorius
Cell Differentiation Process

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