Split Rock (UCMP V-77149) (Miocene of the United States)

Where: Fremont County, Wyoming (43.2° N, 108.2° W: paleocoordinates 44.0° N, 104.3° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Arikaree Formation, Hemingfordian (20.4 - 16.0 Ma)

Environment/lithology: eolian

Size class: macrofossils

Reposited in the UCMP

Primary reference: J. Munthe. 1988. Miocene mammals of the Split Rock area, Granite Mountains basin, central Wyoming. University of California Publications in Geological Sciences 126:1-136 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 19081: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• same as Locality 2b of Schultz and Falkenbach 1940
Mammalia
 Perissodactyla - Equidae
Equinae indet.1 Steinmann and Döderlein 1890 horse
 Artiodactyla - Antilocapridae
Merycodus cf. sabulonis Matthew and Cook 1909 pronghorn
 Artiodactyla - Camelidae
 Artiodactyla - Merycoidodontidae
"Brachycrus vaughani" = Brachycrus laticeps
"Brachycrus vaughani" = Brachycrus laticeps Douglass 1900 oreodont
 Carnivora - Canidae
Borophaginae indet.1 Simpson 1945 bone-crushing dog
"Tomarctus kelloggi" = Paracynarctus kelloggi Merriam 1911 bone-crushing dog
confirmed by Wang et al. 1999
 Theriamorpha - Proscalopidae
Mesoscalops scopelotemos Reed 1960 placental
 Theriamorpha - Erinaceidae
Brachyerix macrotis Matthew 1933 hedgehog
 Lagomorpha - Ochotonidae
Oreolagus nebrascensis McGrew 1941 pika
 Lagomorpha - Leporidae
 Rodentia - Mylagaulidae
"Mesogaulus novellus" = Galbreathia novellus
"Mesogaulus novellus" = Galbreathia novellus Matthew 1924 rodent
 Rodentia - Sciuridae
Protospermophilus kelloggi Black 1963 squirrel
Miospermophilus wyomingensis Black 1963 squirrel
 Rodentia -
Geomyoidea indet.1 Bonaparte 1845 rodent
 Rodentia - Heteromyidae
Perognathinae indet.1 Coues 1875 rodent
 Rodentia - Zapodidae
"Plesiosminthus sabrae" = Schaubeumys sabrae
"Plesiosminthus sabrae" = Schaubeumys sabrae Black 1958 jumping mouse
Reptilia
 Squamata - Iguanidae
? Sceloporus sp.2 Wiegmann 1828 spiny lizard