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Late Cenozoic Geomyids (Mammalia: Rodentia) from the Anza-Borrego Desert. Southern California

Jonathan J. Becker and John A. White
Journal of Vertebrate Paleontology
Vol. 1, No. 2 (Sep., 1981), pp. 211-218
Stable URL: http://www.jstor.org/stable/4522851
Page Count: 8
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Late Cenozoic Geomyids (Mammalia: Rodentia) from the Anza-Borrego Desert. Southern California
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Abstract

Geomyids have been recovered from 1,693 m of section, temporally ranging from mid-Blancan (Pliocene) to early Irvingtonian (Pleistocene). They are represented by Geomys (Nerterogeomys) anzensis n. sp., G. garbanii, and Thomomys sp. The new species resembles G. (Geomys) arenarius in size and proportions of the skull, possibly implying an ecomorphic relationship. The difference in size between G. anzensis and G. garbanii may explain the coexistence of these two species through a large part of the stratigraphic section, by implying two different pocket gopher habitats.

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