Aphelops Draw Quarries (Neogene of the United States)

Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 42.7° N, 102.1° W)

• coordinate based on political unit

When: Johnson Member (Snake Creek Formation), Hemphillian (10.3 - 4.9 Ma)

Environment/lithology: terrestrial

Primary reference: 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]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 18033: authorized by John Alroy, entered by John Alroy on 26.03.1995, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Aelurodon taxoides" Wang et al. 1999: supposedly reworked specimen

"Leptocyon cf. vafer" of Cook and Macdonald 1962 seems extremely unlikely as there are no other Hemphillian or even Clarendonian records of this genus; however, Skinner et al. state that the type is from the Johnson Mbr., as is the type of "Tomarctus propter"
 Accipitriformes - Accipitridae
Buteo conterminus n. sp. hawk
Wetmore 1923: Princeton Locality 1000A, head of Aphelops Draw
 Rodentia - Sciuridae
Spermophilus matthewi n. sp. Black 1963 ground squirrel
 Rodentia - Castoridae
Eucastor cf. tortus Leidy 1858 beaver
described by Stirton 1935
 Rodentia - Mylagaulidae
Mylagaulidae indet.2 Cope 1881 rodent
 Perissodactyla - Rhinocerotidae
Teleoceras hicksi3 Cook 1927 rhinoceros
F:AM 114590
Aphelops mutilus n. sp. Matthew 1924 rhinoceros
 Perissodactyla - Equidae
Nannippus sp.1 Matthew 1926 hipparionine horse
Dinohippus leidyanus Osborn 1918 horse
 Carnivora - Mustelidae
Leptarctus sp. Leidy 1856 mustelid carnivore
 Carnivora - Canidae
Vulpes stenognathus4 Savage 1941 fox
"Aphelops Draw, Snake Creek Formation (early Hemphillian)"
Epicyon saevus5 Leidy 1858 bone-crushing dog
Aphelops Quarry; also "Aphelops Draw, upper sand channel"
Epicyon haydeni1 Leidy 1858 bone-crushing dog
Borophagus secundus5 VanderHoof 1931 bone-crushing dog
 Carnivora - Felidae
"Machairodus coloradensis" = Amphimachairodus coloradensis
"Machairodus coloradensis" = Amphimachairodus coloradensis Cook 1922 cat
 Xenarthra - Megalonychidae
Megalonyx curvidens Matthew 1924 edentate
 Proboscidea - Gomphotheriidae
Gomphotherium sp.1 Burmeister 1837 gomphothere
 Proboscidea - Mammutidae
Mammut matthewi1 Osborn 1921 mastodon
 Artiodactyla - Camelidae
Camelidae indet.1 Gray 1821 camel
 Artiodactyla - Merycoidodontidae
"Merychyus major" = Ustatochoerus major1
"Merychyus major" = Ustatochoerus major1 Leidy 1858 oreodont
 Artiodactyla - Antilocapridae
Texoceros altidens n. sp. Matthew 1924 pronghorn
includes additional material from "Quarry No. 1" of Frick 1937