Pleistocene and Holocene fossils of the yellow-nosed cotton rat (Sigmodon ochrognathus) in New Mexico, Trans-Pecos Texas, and southern Chihuahua indicate past presence within the currently occupied geographic range, as well as occurrences at lower-elevation sites. Suggestions that post-Pleistocene colonization may account for occurrence of northern isolated populations cannot be falsified because extirpation followed by recolonization cannot be ruled out; however, current data indicate that such a scenario is unnecessary.
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1 June 2011
Yellow-Nosed Cotton Rat (Sigmodon ochrognathus), a Long-Time Inhabitant of Trans-Pecos Texas and New Mexico
Arthur H. Harris,
Jonena Hearst
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The Southwestern Naturalist
Vol. 56 • No. 2
June 2011
Vol. 56 • No. 2
June 2011