Clayton Quarry (Miocene of the United States)

Where: Brown County, Nebraska (42.7° N, 100.0° W)

• Paleocoordinates: 45.4° N, 94.7° W (Wright 2013)

• coordinate based on political unit

• small collection-level geographic resolution

When: Merritt Dam Member (Ash Hollow Formation), Clarendonian (12.5 - 9.4 Ma)

Environment/lithology: terrestrial

Primary reference: M. F. Skinner and F. W. Johnson. 1984. Tertiary stratigraphy and the Frick Collection of fossil vertebrates from north-central Nebraska. Bulletin of the American Museum of Natural History 178(3):1-368 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 18095: authorized by John Alroy, entered by John Alroy on 05.08.1992, edited by Jonathan Marcot

Creative Commons license: CC0 (CC0)

Taxonomic list

• probably the same as the FMNH "Quinn Canyon" site; the quarry is in Quinn Canyon and no other FMNH collection from this area is mentioned by Skinner and Johnson; this locality is said by Korth 1997a to be in the Cap Rock Member based on the authority of Skinner and Johnson, which may relate to the fact that these authors place Clayton Quarry very low in the Merritt Dam Member
FMNH specimens seen by JA on 30.5.91
equids: Hulbert 1989 pers. commun.
270 F:AM specimens (Skinner and Johnson 1984), but list is mostly based on FMNH
Show authors, comments, and common names
Mammalia
 Carnivora - Mustelidae
Leptarctus wortmani5
Leptarctus wortmani5 Matthew 1924 mustelid carnivore
F:AM 25169
 Carnivora - Amphicyonidae
Pseudocyon sp.3
Pseudocyon sp.3 Lartet 1851 bear-dog
 Carnivora - Nimravidae
Barbourofelis whitfordi
Barbourofelis whitfordi Barbour and Cook 1915 false sabre-tooth
 Carnivora - Canidae
Paratomarctus euthos7, Epicyon saevus7, Aelurodon taxoides7, Cynarctus crucidens7, Leptocyon matthewi6
Paratomarctus euthos7 McGrew 1935 bone-crushing dog
multiple specimens from "Clayton or East Clayton quarries" (so possibly not present here)
Epicyon saevus7 Leidy 1858 bone-crushing dog
Aelurodon taxoides7 Hatcher 1894 bone-crushing dog
Cynarctus crucidens7 Barbour and Cook 1914 bone-crushing dog
Leptocyon matthewi6 Tedford et al. 2009 canine
 Perissodactyla - Rhinocerotidae
Teleoceras sp.
Teleoceras sp. Hatcher 1894 rhinoceros
JA pers. obs.: FMNH
 Perissodactyla - Equidae
Calippus placidus2, Calippus martini2, Protohippus supremus2, Neohipparion affine2, Nannippus sp.2, Pseudhipparion gratum2, Hippotherium sp.
Calippus placidus2 Leidy 1869 horse
pers. commun.
Calippus martini2 Hesse 1936 horse
pers. commun.
Protohippus supremus2 Leidy 1869 horse
pers. commun.
Neohipparion affine2 Leidy 1869 hipparionine horse
pers. commun.
Nannippus sp.2 Matthew 1926 hipparionine horse
pers. commun.: "A"
Pseudhipparion gratum2 Leidy 1869 hipparionine horse
pers. commun.: also seen by JA at FMNH
Hippotherium sp. Kaup 1832 hipparionine horse
JA pers. obs.: FMNH
 Artiodactyla - Tayassuidae
Macrogenis cf. crassigenis9
Macrogenis cf. crassigenis9 Matthew and Gidley 1904 peccary
probably = "Prosthennops sp." at FMNH
 Artiodactyla - Camelidae
Aepycamelus sp.
Aepycamelus sp. Macdonald 1956 camel
JA pers. obs.: FMNH
 Artiodactyla - Merycoidodontidae
"Ustatochoerus profectus" = Ustatochoerus major
"Ustatochoerus profectus" = Ustatochoerus major Leidy 1858 oreodont
 Artiodactyla - Gelocidae
Pseudoceras skinneri8
Pseudoceras skinneri8 Frick 1937 ruminant
 Rodentia - Mylagaulidae
Mylagaulidae indet.1
Mylagaulidae indet.1 Cope 1881 rodent
 Rodentia - Castoridae
Eucastor sp.
Eucastor sp. Allen 1877 beaver
FMNH
 Rodentia - Heteromyidae
"Mioheteromys agrarius n. sp." = Diprionomys agrarius4
"Mioheteromys agrarius n. sp." = Diprionomys agrarius4 Wood 1935 rodent
of Wood 1935 from FMNH "Quinn Canyon" locality DUPLICATE REF 2132 or 2133
 Lagomorpha - Leporidae
Hypolagus fontinalis
Hypolagus fontinalis Dawson 1958 rabbit
FMNH: mentioned by Dawson 1958
1Alroy 2002; 2Hulbert 1989; 3Hunt 1998; 4Korth 1997; 5Korth and Baskin 2009; 6Tedford et al. 2009; 7Wang et al. 1999; 8Webb 2008; 9Wright 1983