East Clayton Quarry (Miocene of the United States)

Where: Brown County, Nebraska (42.7° N, 100.0° W: paleocoordinates 43.1° N, 97.4° W)

• coordinate based on political unit

• small collection-level geographic resolution

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

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

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 18134: authorized by John Alroy, entered by John Alroy on 05.08.1992, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• equids: Hulbert 1989 pers. commun.
376 F:AM specimens: Skinner and Johnson 1984
Mammalia
 Perissodactyla - Rhinocerotidae
Teleoceras major4 Hatcher 1894 rhinoceros
Aphelops megalodus4 Cope 1873 rhinoceros
 Perissodactyla - Equidae
Hippotherium sp.1 Kaup 1832 hipparionine horse
Pseudhipparion gratum2 Leidy 1869 hipparionine horse
pers. commun.
Nannippus sp.3 Matthew 1926 hipparionine horse
Supplemental Table S1
Hipparion cf. tehonense1 Merriam 1916 hipparionine horse
JA pers. obs. 1/93: "Nannippus A" of Hulbert
Protohippus supremus2 Leidy 1869 horse
pers. commun.
Calippus martini2 Hesse 1936 horse
pers. commun.
Calippus placidus2 Leidy 1869 horse
pers. commun.
 Carnivora - Procyonidae
Protoprocyon savagei n. sp.1 Linares 1981 procyonid carnivore
 Carnivora - Barbourofelidae
Barbourofelis whitfordi Barbour and Cook 1915 carnivoran
 Carnivora - Canidae
Leptocyon matthewi5 Tedford et al. 2009 canine
Cynarctus crucidens6 Barbour and Cook 1914 bone-crushing dog
Aelurodon taxoides6 Hatcher 1894 bone-crushing dog
Epicyon saevus6 Leidy 1858 bone-crushing dog
Paratomarctus euthos6 McGrew 1935 bone-crushing dog
multiple specimens from "Clayton or East Clayton quarries" (so possibly not present here)
 Ungulata - Merycoidodontidae
"Merychyus novomexicanus" = Ustatochoerus medius novomexicanus1
"Merychyus novomexicanus" = Ustatochoerus medius novomexicanus1 Frick 1929 oreodont
 Ungulata - Tayassuidae
Macrogenis cf. crassigenis7 Matthew and Gidley 1904 peccary