Aphelops Draw (Sheep Creek) (Miocene of the United States)

Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.1° N, 99.9° W)

• coordinate based on political unit

When: Sheep Creek Formation, Hemingfordian (20.4 - 16.0 Ma)

Environment/lithology: terrestrial

Primary reference: W. D. Matthew. 1932. New fossil mammals from the Snake Creek Quarries. American Museum Novitates 540:1-8 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 17871: authorized by John Alroy, entered by John Alroy on 26.03.1995, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• this is clearly the same as the "Sheep Creek beds in Aphelops Draw" locality of Skinner et al. 1977 based on catalogue numbers and collection of material by Paul Miller in 1925
"Merychyus cf. elegans" of Schultz and Falkenbach 1947 is from the "massive pinkish sands" that "might well represent upper Marsland deposits" and presumably equals the Harrison Fm. sensu Skinner et al.
unclassified
  -
Crytonyx cooki n. sp.5
phasianid bird: from "upper Sheep Creek... Aphelops Draw area"
Mammalia
 Perissodactyla - Equidae
Archaeohippus penultimus Matthew 1924 anchitheriine horse
described by Bode 1933
Acritohippus tertius4 Osborn 1918 horse
Supplemental Table S1
 Perissodactyla - Chalicotheriidae
Tylocephalonyx skinneri1 Coombs 1979 chalicothere
 Artiodactyla - Moschidae
"Blastomeryx medius" = Blastomeryx gemmifer2
"Blastomeryx medius" = Blastomeryx gemmifer2 Cope 1874 musk deer
 Artiodactyla - Palaeomerycidae
Bouromeryx americanus3 Douglass 1899 ruminant
from "Sheep Creek Beds"; see also Frick 1937