Uva Breaks ( of the United States)

Where: Platte County, Wyoming (42.1° N, 105.0° W: paleocoordinates 43.0° N, 99.2° W)

• coordinate based on political unit

When: Marsland Formation, late Late Arikareean (29.5 - 18.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: K. Munthe. 1981. Skeletal morphology and function of the Miocene rodent Schizodontomys harkseni. PaleoBios 35:1-33 [J. Alroy/J. Alroy/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 18010: authorized by John Alroy, entered by John Alroy on 26.03.1995

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Merychyus minimus" of Schultz and Falkenbach 1947 from "Wheatland area" in Platte Co. may also be from this site
Mammalia
 Rodentia - Heteromyidae
Schizodontomys harkseni Macdonald 1970 rodent
 Carnivora - Canidae
"Canis brachypus n. sp." = Osbornodon brachypus1, Desmocyon thomsoni3
"Canis brachypus n. sp." = Osbornodon brachypus1 Cope 1881 canid
East of Laramie Peak locality of Cope 1881, said by Schultz and Falkenbach 1947 to probably be N of Wheatland in Platte Co. in discussion of Merychyus arenarum
Desmocyon thomsoni3 Matthew 1907 bone-crushing dog
Upper Harrison, Uva Breaks
 Artiodactyla - Merycoidodontidae
Merychyus arenarum2 Cope 1884 oreodont