Highway 138 Borrow Cut (Miocene of the United States)

Also known as SBCM 1.103.53, 125-136; Wye

Where: San Bernardino County, California (34.8° N, 117.0° W: paleocoordinates 33.9° N, 111.4° W)

• coordinate based on political unit

When: Unit 1 Member (Crowder Formation), Late/Upper Hemingfordian (20.4 - 16.0 Ma)

• late Hemingfordian after Reynolds, et al., 2008

Environment/lithology: fluvial; lithology not reported

Size classes: macrofossils, mesofossils

Primary reference: R. E. Reynolds. 1991. Biostratigraphic relationships of Tertiary small vertebrates from Cajon Valley, San Bernardino County, California. In M.O. Woodburne, R.E. Reynolds, and D.P. Whistler, (eds.), San Bernardino County Museum Association Quarterly 38(3):54-59 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 19369: authorized by John Alroy, entered by John Alroy on 26.03.1995

Creative Commons license: CC BY (attribution)

Taxonomic list

• includes at least 13 localities spanning 150' of section
Show authors, comments, and common names
Mammalia
 Perissodactyla - Tapiridae
Tapiridae indet.
Tapiridae indet. Gray 1821 tapir
 Perissodactyla - Equidae
Equidae indet., "Merychippus carrizoensis" = Parapliohippus carrizoensis, Archaeohippus cf. mourningi
Equidae indet. Gray 1821 horse
large
"Merychippus carrizoensis" = Parapliohippus carrizoensis Dougherty 1940 horse
Archaeohippus cf. mourningi Merriam 1913 anchitheriine horse
 Artiodactyla - Palaeomerycidae
Palaeomerycidae indet.
Palaeomerycidae indet. Lydekker 1883 ruminant
 Artiodactyla - Tayassuidae
Tayassuinae indet.
Tayassuinae indet. Palmer 1897 peccary
"Dyseohyus"
 Artiodactyla - Camelidae
Camelidae indet., cf. Aepycamelus sp., cf. Procamelus sp., cf. Michenia sp.
Camelidae indet. Gray 1821 camel
cf. Aepycamelus sp. Macdonald 1956 camel
cf. Procamelus sp. Leidy 1858 camel
cf. Michenia sp. Frick and Taylor 1971 camel
 Carnivora - Canidae
Canidae indet.
Canidae indet. Fischer de Waldheim 1817 canid
 Carnivora - Mustelidae
Miomustela sp., Leptarctus cf. ancipidens
Miomustela sp. Hall 1930 mustelid carnivore
Leptarctus cf. ancipidens White 1941 mustelid carnivore
 Theriamorpha - Soricidae
Paradomnina cf. relictus
Paradomnina cf. relictus Hutchison 1966 shrew
 Rodentia - Zapodidae
Plesiosminthus (Schaubeumys) sp.
Plesiosminthus (Schaubeumys) sp. Viret 1926 jumping mouse
 Rodentia -
Geomyoidea indet.
Geomyoidea indet. Bonaparte 1845 rodent
 Rodentia - Heteromyidae
Trogomys sp., Perognathus cf. minutus, Perognathus cf. furlongi, Proheteromys sulculus, Peridiomys sp.
Trogomys sp. Reeder 1960 rodent
said to be new
Perognathus cf. minutus James 1963 pocket mouse
Perognathus cf. furlongi Gazin 1930 pocket mouse
Proheteromys sulculus Wilson 1960 rodent
Peridiomys sp. Matthew 1924 rodent
said to be new
 Rodentia - Sciuridae
"Tamiini indet." = Marmotini, Petauristodon cf. mathewsi, Miospermophilus cf. wyomingensis
"Tamiini indet." = Marmotini squirrel
Petauristodon cf. mathewsi James 1963 squirrel