Cricetid rodents from the Pliocene Panaca Formation
southeastern Nevada, USA
Very large samples of cricetids were collected from 12 localities in the Pliocene Panaca Formation in Meadow Valley, southeastern Nevada. The most common cricetids in the Panaca small mammal fauna are Mimomys panacaensis, Nevadomys n. gen., and Repomys. Present also are Peromyscus and Onychomys. Enamel microstructure of molars of M. panacaensis and Nevadomys n. gen. were examined under the scanning electronic microscope. Nevadomys n. gen. was probably derived from North American Paramicrotoscoptes. The characters of these cricetids, including stage of evolution, indicate that the Panaca local fauna represents the early Blancan land mammal age.
KEY WORDS: cricetid; arvicoline; schmelzmuster; early Blancan; NALMA
PE Article Number:
Copyright: Society of
Vertebrate Paleontology November 2011
Submission: 15 June 2007. Acceptance: 30 March 2011