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Systematics of Isolated Populations of Short-Tailed Shrews (Soricidae: Blarina) in Texas

Susannah M. Reilly, Richard W. Manning, Chris C. Nice and Michael R. J. Forstner
Journal of Mammalogy
Vol. 86, No. 5 (Oct., 2005), pp. 887-894
Stable URL: http://www.jstor.org/stable/4094433
Page Count: 8
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Systematics of Isolated Populations of Short-Tailed Shrews (Soricidae: Blarina) in Texas
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Abstract

Two isolated and taxonomically unassigned populations of short-tailed shrews (Blarina) exist in Texas, 1 in the Lost Pines region including Bastrop County and 1 at Aransas National Wildlife Refuge on the Gulf Coast. Molecular and morphological methods were used to determine the systematic status of the 2 disjunct Texas populations. Multivariate analyses of size-influenced cranial measurements were unsuccessful in identifying specimens from these populations at the species level. Phylogenetic analyses of the mitochondrial cytochrome-b gene revealed that the samples from disjunct Texas populations form a monophyletic sister clade to B. hylophaga from Kansas and Nebraska; there is little divergence between the 2 Texas populations. Genetic divergence between Texas and Kansas-Nebraska B. hylophaga is comparable to taxonomically recognized east-west divisions within B. brevicauda and B. carolinensis. Therefore, the name Blarina hylophaga plumbea, which originally was applied to the Aransas County population, also should include the Bastrop County population.

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