North Coalinga (Miocene of the United States)

Also known as CIT 108, 129; Domengine Creek; Merychippus Zone; UCMP 2124

Where: Fresno County, California (36.1° N, 120.4° W: paleocoordinates 35.3° N, 115.7° W)

• coordinate based on political unit

When: Temblor Formation, Barstovian (16.0 - 13.6 Ma)

Environment/lithology: terrestrial

Primary reference: F. D. Bode. 1935. The Fauna of the Merychippus Zone, North Coalinga District, California. Carnegie Institution of Washington Publication 453(6):65-96 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 19460: authorized by John Alroy, entered by John Alroy on 27.09.1993, edited by Mark Uhen and Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• CIT 108 is the same as UCMP 2124: Downs 1961
Merriam's types of "Neohipparion molle" and "Pliohippus coalingensis" are from "North Coalinga" but in the "Jacalitos formation" = Etchegoin Fm. according to Tedford et al. 1987; these are widely separated stratigraphically according to Nomland 1916 and are of unclear relationships to the USGS sites in the Etchegoin
"? Prosthennops sp." is indeterminate: Colbert 1938
Chondrichthyes
 Lamniformes - Lamnidae
Isurus sp.3 Agassiz 1843 mako shark
Carcharodon sp.3 Smith 1838 white shark
Mammalia
 Rodentia - Castoridae
Monosaulax sp. Stirton 1935 beaver
said to be "M. pansus" and from both CIT 108 and CIT 129 by Stirton 1935
 Perissodactyla - Paleoparadoxiidae
Paleoparadoxia tabatai2 Tokunaga 1939 desmostylian
 Perissodactyla - Rhinocerotidae
Aphelops megalodus4 Cope 1873 rhinoceros
 Perissodactyla - Equidae
Merychippus californicus n. sp. Merriam 1915 horse
see Bode 1934; from both CIT 108 and CIT 129, see Downs 1961
Merychippus brevidontus n. sp. Bode 1935 horse
see Bode 1934
Desmatippus avus1 Marsh 1874 anchitheriine horse
Archaeohippus mourningi Merriam 1913 anchitheriine horse
Hypohippus sp. Leidy 1858 anchitheriine horse
 Carnivora - Ursidae
Ursidae indet.1 Gray 1825 bear
 Carnivora - Amphicyonidae
Amphicyonidae indet.1 Haeckel 1886 bear-dog
 Carnivora - Canidae
Borophaginae indet.1 Simpson 1945 bone-crushing dog
Aelurodon sp. Leidy 1858 bone-crushing dog
probably OK; compared very closely to A. "wheelerianus" and contrasted with Epicyon haydeni and "E. aphobus"
 Proboscidea - Mammutidae
Mammutidae indet.5 Hay 1922 mastodon
"Miomastodon or Trilophodon? sp."
 Artiodactyla - Tayassuidae
Cynorca occidentale6 Woodburne 1969 peccary
 Artiodactyla - Camelidae
Camelidae indet. Gray 1821 camel
"Procamelus", "possibly Miolabis", and "alticamelid ?"
 Artiodactyla - Palaeomerycidae
Palaeomerycidae indet. Lydekker 1883 ruminant
"Blastomeryx (Dyseomeryx) sp.": comparisons are entirely to "Blastomeryx" riparius