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, Democricetodon similis, Democricetodon gaillardi, Democricetodon fejfari, Democricetodon franconicus, Democricetodon mutilus, Democricetodon crassus, Democricetodon hispanicus, Democricetodon kaonou, Democricetodon sulcatus, Democricetodon freisingensis, Democricetodon khani, Democricetodon haltmari, Democricetodon minor, Democricetodon affinis, Democricetodon romieviensis, Democricetodon vindoboniensis, Democricetodon brevis
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.
Ecology: ground dwelling herbivore
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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