Eubanks (Miocene of the United States)

Also known as Eubanks Ranch House; Pawnee Quarry

Where: Weld County, Colorado (40.8° N, 104.2° W: paleocoordinates 41.5° N, 100.4° W)

• coordinate based on political unit

When: Pawnee Creek Formation, Hemingfordian (20.4 - 16.0 Ma)

Environment/lithology: terrestrial

Primary reference: E. C. Galbreath. 1953. A contribution to the Tertiary geology and paleontology of northeastern Colorado. University of Kansas Paleontological Contributions Vertebrata 4:1-120 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 17908: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• type locality of Pawnee Creek Fm.
apparently most or all of Galbreath's "certain" records are from a single locality in Weld Co. (see fig. 8); records of Tedford et al. 1987 are for "the type locality and correlated sites"; Woodburne 1996a indicates that Galbreath's quarry is the same as the F:AM Pawnee Quarry, which presumably yielded Tedford's material
overlain by Horse and Mastodon Quarry, and Pawnee Buttes fauna of Tedford et al. 1987 is from even higher channel fills; see also Fig. 7 of Woodburne 1996a
ash immediately below Pawnee Quarry dated at 14.8 Ma (Ar-Ar?): Woodburne 1996a
unit includes the Pawnee Buttes Ash
"probable" occurrences: "Amblycastor? sp." Tomarctus brevirostris - see Courthouse Buttes "Amphicyon" sinapius - presumably type of Matthew 1902c Proboscidea indet. Aphelops megalodus (sic) "Ustatochoerus? schrammi" - see Schultz and Falkenbach 1941: F:AM specimens from "N. of Pawnee Buttes" and "Pawnee Buttes area" Cranioceras pawniensis: type of Frick 1937 from "west of buttes, middle horizon"; also postcrania from "Quarry Hill"
record of cf. Hystricops sp. discussed by Voorhies 1990 is Galbreath's "? Amblycastor sp." of uncertain provenance
Mammalia
 Rodentia - Castoridae
Monosaulax curtus Matthew and Cook 1909 beaver
 Perissodactyla - Rhinocerotidae
Teleoceras medicornutum4 Osborn 1904 rhinoceros
"Pawnee Quarry"
Aphelops megalodus4 Cope 1873 rhinoceros
 Perissodactyla - Equidae
Equidae indet.1 Gray 1821 horse
"Protohippus sejunctus" = Merychippus sejunctus1 Cope 1874 horse
"Merychippus sphenodus" = Cormohipparion sphenodus7 Cope 1889 hipparionine horse
sensu stricto, from Pawnee Quarry; type of Cope 1889 probably came from this level and may be from this quarry; further material is from 3 Points Quarry, just above the Eubanks horizon
Calippus sp.5 Matthew and Stirton 1930 horse
Parahippus cf. pawniensis1 Gidley 1907 anchitheriine horse
Hypohippus osborni5 Gidley 1907 anchitheriine horse
 Carnivora - Amphicyonidae
Cynelos sp.2 Jourdan 1862 bear-dog
"Early Barstovian... Pawnee Buttes area, Weld Co."; presumably includes "Amphicyon ingens" of Tedford et al. 1987 from Eubanks because Amphicyon is omitted by Hunt
 Carnivora - Canidae
Microtomarctus conferta6 Matthew 1918 bone-crushing dog
Pawnee Quarry; "north of 3 Points Pit"; "R. Day Ranch, 3 Points, west side"
Aelurodon asthenostylus6 Wang et al. 1999 bone-crushing dog
Pawnee Buttes; "Two mi west of Quarry"; "Davis Ranch, first canyon east of the Kiota Road"; "Hereford, middle horizon"
Tomarctus brevirostris6 Cope 1873 bone-crushing dog
"Middle Horizon near Hereford"; Question Mark Pit; "Three Point, East Side Pit"; Pawnee Quarry; Big Spring Quarry
 Ungulata - Merycoidodontidae
Ticholeptus sp.5 Cope 1878 oreodont
presumably includes "Ustatochoerus sp."
Brachycrus sp.3 Matthew 1901 oreodont
 Ungulata - Camelidae
Protolabis sp. Cope 1876 camel
"Probably P. heterodontus and/or P. angustidens"
Miolabis sp.5 Hay 1899 camel
Aepycamelus sp.5 Macdonald 1956 camel
 Ungulata - Palaeomerycidae
Dromomeryx sp.5 Douglass 1909 ruminant
Bouromeryx sp.5 Skinner et al. 1977 ruminant