PBDB Collection

Wade 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 (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 18447: authorized by John Alroy, entered by John Alroy on 05.08.1992, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• an ash at the quarry level may be equivalent to the Davis Ash, which in any case is 1) low in the Merritt Dam Mbr., 2) less than 2 mi downstream overlying Burge Quarry, and 3) no closer to any other Merritt Dam quarry (Skinner and Johnson 1984); therefore, I treat this as the fauna calibrated by the Davis Ash, which was dated at 9.7 +/- 1.2 Ma (FT zircon) and 7.5 +/- 2.2 and 10.2 +/- 0.7 Ma (FT on glass) by Skinner and Johnson, and again at 10.3 +/- 0.3 (FT on zircon) and 6.9 +/- 0.7 Ma (FT on glass) by Naeser et al. 1980; the glass dates are inconsistent, the zircon dates are not, and the 10.3 date, which seems to be a revision of the 9.7 date, seems best
164 F:AM specimens: Skinner and Johnson 1984

Show authors, comments, and common names

unclassified
-	"Clarendonian peccary" sp.⁸ "Clarendonian peccary" sp.⁸ Machaerodus Quarry form; species "A" of Wright 1983
Mammalia
Carnivora - Canidae	Epicyon saevus⁷, Epicyon haydeni⁷, Carpocyon robustus⁷ Epicyon saevus⁷ Leidy 1858 bone-crushing dog Epicyon haydeni⁷ Leidy 1858 bone-crushing dog Carpocyon robustus⁷ Green 1948 bone-crushing dog
Carnivora - Nimravidae	Barbourofelis morrisi Barbourofelis morrisi Schultz et al. 1970 false sabre-tooth
Perissodactyla - Equidae	Hipparion tehonense³, Calippus martini² Hipparion tehonense³ Merriam 1916 hipparionine horse Calippus martini² Hesse 1936 horse pers. commun.
Perissodactyla - Rhinocerotidae	Teleoceras major⁴, Aphelops megalodus⁴ Teleoceras major⁴ Hatcher 1894 rhinoceros Aphelops megalodus⁴ Cope 1873 rhinoceros
Perissodactyla - Tapiridae	Tapirus johnsoni⁶ Tapirus johnsoni⁶ Schultz et al. 1975 tapir unnamed and unnumbered UNSM quarry that almost certainly is this locality based on coordinates and stratigraphy
Artiodactyla - Merycoidodontidae	"Merychyus novomexicanus" = Ustatochoerus medius novomexicanus¹ "Merychyus novomexicanus" = Ustatochoerus medius novomexicanus¹ Frick 1929 oreodont
Artiodactyla - Tayassuidae	Skinnerhyus shermerorum⁵ Skinnerhyus shermerorum⁵ Prothero and Pollen 2013 peccary Machaerodus Quarry form; species "A" of Wright 1983

¹Alroy 2002; ²Hulbert 1989; ³Mihlbachler et al. 2011; ⁴Prothero 2005; ⁵Prothero and Pollen 2013; ⁶Schultz et al. 1975; ⁷Wang et al. 1999; ⁸Wright 1998