Mammalia - Rodentia - Cricetidae
Alternative combination: Peromyscus longidens
Synonyms: Copemys niobrariensis Hoffmeister 1959, Miochomys niobrariensis Hoffmeister 1959
Full reference: E. R. Hall. 1930. Rodents and lagomorphs from the Barstow Beds of southern California. University of California Publications, Bulletin of the Department of Geological Sciences 19(13):313-318
Belongs to Copemys according to E. H. Lindsay 1972
See also Clark et al. 1964, Hall 1930 and Voorhies 1990
Sister taxa: Copemys barstowensis, Copemys esmeraldensis, Copemys lindsayi, Copemys loxodon, Copemys pagei, Copemys pisinnus, Copemys russelli, Copemys shotwelli, Copemys tenuis
Type specimens:
- Copemys longidens: UCCVP 28502, a partial skull (with M1 and mandible dext. carrying complete dentition). Its type locality is Rodent Hill, which is in a Barstovian terrestrial horizon in the Barstow Formation of California.
- Miochomys niobrariensis: UCMP 36103, a maxilla (fragment maxilla sin. with M1). Its type locality is Fort Niobrara, which is in a Barstovian terrestrial horizon in the Valentine Formation of Nebraska.
Distribution:
• Miocene of Canada (1: Saskatchewan collection), United States (38: California, Nebraska, South Dakota, Wyoming)
Total: 39 collections including 40 occurrences
Specimen images are retrieved through the ePANDDA API.
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