Spring Draw (Orellan) (Oligocene of the United States)

Where: Niobrara County, Wyoming (43.0° N, 104.5° W: paleocoordinates 44.2° N, 96.4° W)

• coordinate based on political unit

When: Orellan (33.9 - 33.3 Ma)

Environment/lithology: terrestrial

Primary reference: X. Wang. 1994. Phylogenetic systematics of the Hesperocyoninae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 221:1-207 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 17193: authorized by John Alroy, entered by John Alroy on 18.10.1995

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Carnivora - Canidae
Hesperocyon gregarius Cope 1873 canid
"Upper Spring Draw, Indian Creek area, Hat Creek Basin... Orellan"; "Piper Ranch, Spring Draw" - 15, 35, and 75 ft above PWL; "Spring Draw, 1.5 mi W of Ant Hill" 70 ft above PWL
 Artiodactyla - Merycoidodontidae
"Merycoidodon culbertsoni" = Merycoidodon culbertsonii2, "Platyochoerus platycephalus" = Miniochoerus affinis1
"Merycoidodon culbertsoni" = Merycoidodon culbertsonii2 Leidy 1848 oreodont
includes their "M. culbertsoni osborni"; "Paramerycoidodon georgei" "Otionohyus wardi"; and "Genetochoerus periculorum" - all from Brule Zone A
"Platyochoerus platycephalus" = Miniochoerus affinis1 Leidy 1869 oreodont
(synonym of M. affinis): Brule Zone A M. ("Stenopsochoerus") chadronensis Schultz and Falkenbach 1956; includes their "S. douglasensis"; sample is apparently stratigraphically mixed because affinis and chadronensis form a chronocline elsewhere