PBDB Collection

East Clayton Quarry (Miocene to of the United States)

Where: Brown County, Nebraska (42.7° N, 100.0° W: paleocoordinates 43.0° N, 98.0° W)

• coordinate based on political unit

• small collection-level geographic resolution

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

Show authors, comments, and common names

Mammalia
Artiodactyla - Tayassuidae	Macrogenis cf. crassigenis⁷ Macrogenis cf. crassigenis⁷ Matthew and Gidley 1904 peccary
Artiodactyla - Merycoidodontidae	"Merychyus novomexicanus" = Ustatochoerus medius novomexicanus¹ "Merychyus novomexicanus" = Ustatochoerus medius novomexicanus¹ Frick 1929 oreodont
Perissodactyla - Equidae	Protohippus supremus², Calippus placidus², Calippus martini², Nannippus sp.³, Hippotherium sp.¹, Pseudhipparion gratum², Hipparion cf. tehonense¹ Protohippus supremus² Leidy 1869 horse pers. commun. Calippus placidus² Leidy 1869 horse pers. commun. Calippus martini² Hesse 1936 horse pers. commun. Nannippus sp.³ Matthew 1926 hipparionine horse Supplemental Table S1 Hippotherium sp.¹ Kaup 1832 hipparionine horse Pseudhipparion gratum² Leidy 1869 hipparionine horse pers. commun. Hipparion cf. tehonense¹ Merriam 1916 hipparionine horse JA pers. obs. 1/93: "Nannippus A" of Hulbert
Perissodactyla - Rhinocerotidae	Aphelops megalodus⁴, Teleoceras major⁴ Aphelops megalodus⁴ Cope 1873 rhinoceros Teleoceras major⁴ Hatcher 1894 rhinoceros
Carnivora - Canidae	Leptocyon matthewi⁵, Epicyon saevus⁶, Paratomarctus euthos⁶, Aelurodon taxoides⁶, Cynarctus crucidens⁶ Leptocyon matthewi⁵ Tedford et al. 2009 canine 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) Aelurodon taxoides⁶ Hatcher 1894 bone-crushing dog Cynarctus crucidens⁶ Barbour and Cook 1914 bone-crushing dog
Carnivora - Nimravidae	Barbourofelis whitfordi Barbourofelis whitfordi Barbour and Cook 1915 false sabre-tooth
Carnivora - Procyonidae	Protoprocyon savagei n. sp.¹ Protoprocyon savagei n. sp.¹ Linares 1981 procyonid carnivore

¹Alroy 2002; ²Hulbert 1989; ³Mihlbachler et al. 2011; ⁴Prothero 2005; ⁵Tedford et al. 2009; ⁶Wang et al. 1999; ⁷Wright 1983