Flint Creek Beds (Miocene of the United States)

Where: Granite County, Montana (46.4° N, 113.2° W: paleocoordinates 47.1° N, 110.0° W)

• coordinate based on political unit

When: Barstovian (16.0 - 13.6 Ma)

• member-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Primary reference: C. C. Black. 1961. New rodents from the early Miocene deposits of Sixty-six Mountain, Wyoming. Breviora. Annals of Carnegie Museum 36 [J. Alroy/J. Alroy/J. Ju]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 18894: authorized by John Alroy, entered by John Alroy on 27.09.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• first described by Douglass 1903
section spans about 40 m: Pierce and Rasmussen 1989
type of Cotimus alicae is from an Arikareean stratum: Engesser 1979

specimen of "Desmatochoerus newchicagoensis" of Schultz and Falkenbach 1954 is from the Cabbage Patch Fm.

"Desmatochoerus newchicagoensis" type of Schultz and Falkenbach 1954 is from the "upper Miocene" at New Chicago and is clearly from this level, but is omitted by Black as well as Pierce and Rasmussen 1989
Reptilia
 Squamata - Loxocemidae
"Ogmophus arenarum n. sp." = Ogmophis arenarum2
"Ogmophus arenarum n. sp." = Ogmophis arenarum2 Douglass 1903 Mexican burrowing snake
"from the Flint Creek beds" near New Chicago
Mammalia
 Rodentia - Sciuridae
Spermophilus primitivus1 Bryant 1945 ground squirrel
 Rodentia - Geomyidae
Geomyidae indet.4 Bonaparte 1845 pocket gopher
 Rodentia - Castoridae
Monosaulax sp. Stirton 1935 beaver
 Rodentia - Mylagaulidae
Alphagaulus pristinus1 Douglass 1903 rodent
 Lagomorpha - Leporidae
 Lagomorpha - Ochotonidae
Oreolagus sp.4 Dice 1917 pika
 Lipotyphla - Talpidae
Talpidae indet.4 Fischer de Waldheim 1817 mole
 Perissodactyla - Rhinocerotidae
Peraceras profectum1 Matthew 1899 rhinoceros
 Perissodactyla - Equidae
Equinae indet.1 Steinmann and Döderlein 1890 horse
Archaeohippus sp.4 Gidley 1906 anchitheriine horse
Hypohippus sp. Leidy 1858 anchitheriine horse
 Carnivora - Mustelidae
? Leptarctus sp.4 Leidy 1856 mustelid carnivore
 Carnivora - Canidae
Paratomarctus temerarius6 Leidy 1858 bone-crushing dog
Euoplocyon brachygnathus1 Douglass 1903 bone-crushing dog
 Ungulata - Merycoidodontidae
Ticholeptus zygomaticus5 Cope 1878 oreodont
Brachycrus laticeps Douglass 1900 oreodont
this includes the types of "Pronomotherium altiramus," "P. elrodi," "P. laticeps," and "P. madisonium," all from the lower Madison Valley: see Thorpe 1937, Schultz and Falkenbach 1940
"Merychyus smithi" = Merychyus elegans smithi1 Douglass 1903 oreodont
 Ungulata - Tayassuidae
Hesperhys vagrans Douglass 1903 peccary
 Ungulata - Camelidae
Camelidae indet.1 Gray 1821 camel
 Ungulata - Palaeomerycidae
Dromomeryx borealis, "Dromomeryx antilopinus" = Subdromomeryx antilopinus3
Dromomeryx borealis Cope 1877 ruminant
probably includes type of Cope from "Deep River" and new material of Frick 1937 from "E. New Chicago"
"Dromomeryx antilopinus" = Subdromomeryx antilopinus3 Scott 1893 ruminant
"E. New Chicago"
 Ungulata - Antilocapridae
Merycodontinae indet.1 Matthew 1904 pronghorn