PBDB Collection

Aphelops Draw Quarries (Neogene of the United States)

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

• Paleocoordinates: 44.3° N, 100.5° W (Wright 2013)

• 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: CC0 (CC0)

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"

Show authors, comments, and common names

Mammalia
Carnivora - Canidae	Vulpes stenognathus⁴, "Aelurodon validus n. sp." = Epicyon haydeni, Epicyon saevus⁵, Borophagus secundus⁵ Vulpes stenognathus⁴ Savage 1941 fox "Aphelops Draw, Snake Creek Formation (early Hemphillian)" "Aelurodon validus n. sp." = Epicyon haydeni Leidy 1858 bone-crushing dog also at Aphelops Quarry, see Wang et al. 1999 Epicyon saevus⁵ Leidy 1858 bone-crushing dog Aphelops Quarry; also "Aphelops Draw, upper sand channel" Borophagus secundus⁵ VanderHoof 1931 bone-crushing dog
Carnivora - Felidae	"Machairodus coloradensis" = Amphimachairodus coloradensis "Machairodus coloradensis" = Amphimachairodus coloradensis Cook 1922 cat
Carnivora - Mustelidae	Leptarctus sp. Leptarctus sp. Leidy 1856 mustelid carnivore
Artiodactyla - Antilocapridae	Texoceros altidens n. sp. Texoceros altidens n. sp. Matthew 1924 pronghorn includes additional material from "Quarry No. 1" of Frick 1937
Artiodactyla - Bovidae	Neotragocerus improvisus Neotragocerus improvisus Matthew and Cook 1909 antelope
Artiodactyla - Merycoidodontidae	Ustatochoerus major Ustatochoerus major Leidy 1858 oreodont see also Schultz and Falkenbach 1941
Artiodactyla - Camelidae	Camelidae indet.¹ Camelidae indet.¹ Gray 1821 camel
Perissodactyla - Equidae	"Hipparion cf. lenticulare" = Nannippus lenticularis, Dinohippus leidyanus "Hipparion cf. lenticulare" = Nannippus lenticularis Cope 1893 hipparionine horse Dinohippus leidyanus Osborn 1918 horse
Perissodactyla - Rhinocerotidae	Aphelops mutilus n. sp., Teleoceras hicksi³ Aphelops mutilus n. sp. Matthew 1924 rhinoceros Teleoceras hicksi³ Cook 1927 rhinoceros F:AM 114590
Rodentia - Castoridae	Eucastor cf. tortus Eucastor cf. tortus Leidy 1858 beaver described by Stirton 1935
Rodentia - Mylagaulidae	Mylagaulidae indet.² Mylagaulidae indet.² Cope 1881 rodent
Rodentia - Sciuridae	Spermophilus matthewi n. sp. Spermophilus matthewi n. sp. Black 1963 ground squirrel
Proboscidea - Mammutidae	"Pliomastodon matthewi n. sp." = Mammut matthewi "Pliomastodon matthewi n. sp." = Mammut matthewi Osborn 1921 mastodon
Proboscidea - Gomphotheriidae	Stegomastodon nebrascensis n. sp. Stegomastodon nebrascensis n. sp. Osborn 1924 gomphothere replaces ID of Osborn 1924a
Megatherioidea - Megalonychidae	Megalonyx curvidens Megalonyx curvidens Matthew 1924 edentate
Aves
Accipitriformes - Accipitridae	Buteo conterminus n. sp. Buteo conterminus n. sp. Wetmore 1923 hawk Wetmore 1923: Princeton Locality 1000A, head of Aphelops Draw

¹Alroy 2002; ²Korth 2000; ³Prothero 2005; ⁴Tedford et al. 2009; ⁵Wang et al. 1999