Age. Rancholabrean (Morgan and Lucas
2005).
General Description. Tramperos Creek just west of the old Woodson Ranch, about 50 km southwest of Clayton (White and Morgan 2011). "The fossils occur in nearly vertical outcrops along the south and east sides of Tramperos Creek. The exposed section is about 200 m long and reaches a maximum of 10 m in thickness"(White and Morgan 2011:641).
Discussion. Bones came primarily from the lower 3 m of the outcrop, and the fauna indicates permanent water in the form of a stream or lake (White and Morgan 2011). White and Morgan considered all members of Capromeryx with the length of the anterior prong of the horn core less than 50% of the length of the posterior to belong to the species C. furcifer; the listing has been changed accordingly.
Fauna.
Ictalurus—Catfish (Morgan and Harris 2015)
Ambystoma mavortium—Barred Tiger Salamander (White and Morgan 2011)
Ambystoma tigrinum; with changes in nomenclature, this is assumed to represent A. mavortium)
Anaxyrus sp.—Nearctic Toads (White and Morgan 2011, as Bufo
sp.)
Lithobates sp.—Leopard Frogs (White and Morgan 2011)
Sauria—Lizards (White and Morgan 2011)
Colubridae—Harmless Egg-laying Snakes (White and Morgan 2011)
Anatidae—Ducks, Geese, and Swans (White and Morgan 2011)
Passeriformes—Perching Birds (White and Morgan 2011)
†Mammuthus columbi—Columbian Mammoth (Morgan and Lucas 2005)
Cynomys ludovicianus—Black-tailed Prairie Dog (Morgan and Lucas
2005)
Large Spermophile Ground Squirrel—Spermophile Ground Squirrels (White and Morgan
2011)
Small Spermophile Ground Squirrel—Spermophile Ground Squirrels (White and Morgan
2011)
Perognathus sp.—Silky Pocket Mice (Morgan and Lucas 2005)
Geomys bursarius—Plains Pocket Gopher (Morgan and Lucas 2005)
Thomomys sp.—Thomomys Pocket Gopher (Morgan and Lucas 2005)
Microtus sp.—Voles (Morgan and Lucas 2005)
Ondatra zibethicus—Common Muskrat (Morgan and Lucas 2005)
Peromyscus sp.—White-footed Mice (Morgan and Lucas 2005)
Lepus sp.—Jackrabbit (Morgan and Lucas 2005)
Sylvilagus audubonii—Desert Cottontail (Morgan and Lucas 2005) (?)
Soricidae—Shrews (Morgan and Lucas 2005)
†Equus niobrarensis—Niobrara Horse (Morgan and Lucas 2005)
†Camelops hesternus—Yesterday's Camel (Morgan and Lucas
2005)
†Capromeryx furcifer—Matthew's Pronghorn (White and Morgan
2011)
Bison cf. antiquus—Ancient Bison (White and Morgan 2011)
Literature. Morgan and Harris 2015; Morgan and Lucas 2005; White and Morgan 2011.
Last Update: 8 Feb 2016