Leptarctus Quarry (Miocene of the United States)

Where: Cherry County, Nebraska (42.8° N, 100.8° W: paleocoordinates 43.3° N, 98.2° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Merritt Dam Member (Ash Hollow Formation), Clarendonian (13.6 - 10.3 Ma)

Environment/lithology: terrestrial

Primary reference: C. B. Schultz, M. Schultz, and L. D. Martin. 1970. A new Tribe of Saber-toothed cats (Barbourofelini) from the Pliocene of North America. Bulletin of the Nebraska State Museum 9(1):1-31 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 18227: authorized by John Alroy, entered by John Alroy on 05.08.1992, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• 409 F:AM and "several" UCMP specimens: Skinner and Johnson 1984
Mammalia
 Perissodactyla - Rhinocerotidae
Teleoceras major10 Hatcher 1894 rhinoceros
Aphelops megalodus10 Cope 1873 rhinoceros
 Perissodactyla - Equidae
Pseudhipparion skinneri6 Webb and Hulbert 1986 hipparionine horse
pers. commun.
Neohipparion trampasense4 Edwards 1982 hipparionine horse
Neohipparion affine9 Leidy 1869 hipparionine horse
Protohippus cf. gidleyi6 Hulbert 1988 horse
pers. commun.
Calippus cerasinus5 Hulbert 1988 horse
Calippus regulus12 Johnston 1937 horse
DUPLICATE REF 781 or 3519
Hypohippus sp.7 Leidy 1858 anchitheriine horse
 Carnivora - Barbourofelidae
Barbourofelis morrisi n. sp. Schultz et al. 1970 carnivoran
 Carnivora - Mustelidae
Leptarctus wortmani8 Matthew 1924 mustelid carnivore
F:AM 25154, 25172, and 25174
 Carnivora - Canidae
Leptocyon matthewi11 Tedford et al. 2009 canine
Aelurodon taxoides13 Hatcher 1894 bone-crushing dog
Epicyon saevus2 Leidy 1858 bone-crushing dog
confirmed by Wang et al. 1999
Epicyon haydeni2 Leidy 1858 bone-crushing dog
confirmed by Wang et al. 1999
Carpocyon robustus13 Green 1948 bone-crushing dog
Paratomarctus euthos13 McGrew 1935 bone-crushing dog
 Ungulata - Merycoidodontidae
"Merychyus major" = Ustatochoerus major1
"Merychyus major" = Ustatochoerus major1 Leidy 1858 oreodont
 Ungulata - Tayassuidae
Macrogenis sp.14 Wright 1993 peccary
new Leptarctus Quarry species; manuscript name is "M. skinneri"; see also Wright 1993, 1998
 Ungulata - Palaeomerycidae
Cranioceras unicornis1 Matthew 1918 ruminant
 Ungulata - Antilocapridae
Plioceros floblairi3 Frick 1937 pronghorn
"tentatively referred"