Aphelops Draw (Sheep Creek): Hemingfordian, Nebraska

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Crytonyx cooki n. sp.
Skinner et al. 1977
phasianid bird: from "upper Sheep Creek... Aphelops Draw area"
Mammalia - Perissodactyla - Equidae
Archaeohippus penultimus Matthew 1924
described by Bode 1933
Acritohippus tertius (Osborn 1918)
Mihlbachler et al. 2011
original and current combination Merychippus isonesus tertius
Supplemental Table S1
Mammalia - Perissodactyla - Chalicotheriidae
Moropus sp. Marsh 1877
    = Tylocephalonyx skinneri Coombs 1979
Coombs 1979
replaces ID of Skinner et al. 1977; exact level unclear
Mammalia - Moschidae
Blastomeryx gemmifer (Cope 1874)
    = Blastomeryx medius Matthew 1924
Frick 1937
synonym of Blastomeryx gemmifer
"Blastomeryx gemmifer medius": "B. sp."; both Blastomeryx and "Dyseomeryx" are listed by Matthew; latter could represent Aletomeryx but probably is Sinclairomeryx
Mammalia - Palaeomerycidae
Bouromeryx milleri n. sp. (Frick 1937)
Skinner et al. 1977
from "Sheep Creek Beds"; see also Frick 1937
    = Bouromeryx americanus Douglass 1899
Liter and Prothero 2003
see common names

Geography
Country:United States State/province:Nebraska County:Sioux
Coordinates: 42.4° North, 103.8° West (view map)
Paleocoordinates:43.1° North, 99.9° West
Basis of coordinate:based on political unit
Time
Period:Neogene Epoch:Miocene
Stage:Burdigalian 10 m.y. bin:Cenozoic 5
*Period:Tertiary
Key time interval:Hemingfordian
Age range of interval:18.50000 - 16.30000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Sheep Creek
Lithology and environment
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Collection methods and comments
Taxonomic list comments: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.
Metadata
Database number:17871
Authorizer:J. Alroy, J. Marcot Enterer:J. Alroy, J. Marcot
Research group:vertebrate
Created:1995-03-26 00:00:00 Last modified:2002-06-03 03:27:42
Access level:the public Released:1995-03-26 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
2480. W. D. Matthew. 1932. New fossil mammals from the Snake Creek Quarries. American Museum Novitates 540:1-8 [J. Alroy/J. Alroy/J. Marcot]

Secondary references:

1275 M. C. Coombs. 1979. Tylocephalonyx, a new genus of North American dome-skulled chalicotheres (Mammalia, Perissodactyla). Bulletin of the American Museum of Natural History 164(1):1-64 [J. Alroy/J. Alroy/M. Uhen]
6222 C. Frick. 1937. Horned ruminants of North America. Bulletin of the American Museum of Natural History 69:1-669 [J. Alroy/J. Alroy/M. Uhen]
61275 M. C. Mihlbachler, F. Rivals, N. Solounias and G. M. Semprebon. 2011. Dietary Change and Evolution of Horses in North America. Science 331:1178-1181 [J. Marcot/J. Marcot]
52057 T. M. Rothwell. 2001. A Partial Skeleton of Pseudaelurus (Carnivora: Felidae) from the Nambé Member of the Tesuque Formation, Española Basin, New Mexico. American Museum Novitates 3342:1-31 [J. Marcot/J. Marcot]
3175 M. F. Skinner, S. M. Skinner, and R. J. Gooris. 1977. Stratigraphy and biostratigraphy of late Cenozoic deposits in central Sioux County, western Nebraska. Bulletin of the American Museum of Natural History 158(5):263-370 [J. Alroy/J. Alroy/J. Alroy]