American Horse Creek ( of the United States)

Also known as SDSM V-696

Where: Shannon County, South Dakota (43.3° N, 102.5° W: paleocoordinates 44.1° N, 97.4° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Lower Member (Harrison Formation), Harrisonian (24.8 - 20.4 Ma)

• "basal member"

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Reposited in the SDSM

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 17743: authorized by John Alroy, entered by John Alroy on 26.03.1995, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• Schizodontomys harkseni Rensberger 1973c: LACM 65127, American Horse Creek
possibly relevant: Schizodontomys sulcidens Rensberger 1973c: type, 5 mi S of American Horse Creek, "lower Rosebud" Fm. Schaubeumys ("Plesiosminthus") grangeri Green 1977: SDSM V-696; NISP 6 Phlaocyon minor Wang et al. 1999: "2 mi west of American Horse Creek, Upper Rosebud Beds"
Mammalia
 Carnivora - Canidae
Enhydrocyon crassidens Matthew 1907 canid
"Upper Rosebud" 6 mi W of American Horse Creek; I assume this is the same as the oreodont "Lower Rosebud" localities but could be wrong
 Artiodactyla - Merycoidodontidae
"Merycochoerus carrikeri" = Promerycochoerus carrikeri1, "Merycoides relictus" = Paramerychyus relictus1
"Merycochoerus carrikeri" = Promerycochoerus carrikeri1 Peterson 1907 oreodont
"Merycoides relictus" = Paramerychyus relictus1 Loomis 1924 oreodont
 Artiodactyla - Hypertragulidae
Nanotragulus loomisi2 Lull 1922 ruminant
AMNH 13821