Split Rock (UCMP V-77147) (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 19079: authorized by John Alroy, entered by John Alroy on 27.09.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Squamata - Anguidae
Gerrhonotus sp.2 Wiegmann 1828 alligator lizard
 Squamata - Crotalidae
"cf. Crotalinae indet." = Crotalidae2
"cf. Crotalinae indet." = Crotalidae2 Oppel 1811 pit viper
Mammalia
 Lagomorpha - Ochotonidae
Oreolagus nebrascensis McGrew 1941 pika
 Rodentia - Mylagaulidae
"Mesogaulus novellus" = Galbreathia novellus, "Mesogaulus vetus" = Alphagaulus vetus
"Mesogaulus novellus" = Galbreathia novellus Matthew 1924 rodent
"Mesogaulus vetus" = Alphagaulus vetus Matthew 1924 rodent
confirmed by Korth 2000d
 Rodentia - Sciuridae
Miospermophilus wyomingensis Black 1963 squirrel
 Rodentia - Heteromyidae
Harrymys irvini Munthe 1988 rodent
 Perissodactyla - Equidae
Equinae indet.1 Steinmann and Döderlein 1890 horse
 Artiodactyla - Merycoidodontidae
"Brachycrus sweetwaterensis" = Brachycrus laticeps
"Brachycrus sweetwaterensis" = Brachycrus laticeps Douglass 1900 oreodont
 Artiodactyla - Camelidae
 Placentalia -
Carnivora indet. Bowdich 1821 carnivoran
 Carnivora - Mustelidae
Mustelidae indet. Fischer 1817 mustelid carnivore
 Soricomorpha - Proscalopidae
Mesoscalops scopelotemos Reed 1960 placental
 Tribosphenida - Erinaceidae
Brachyerix macrotis Matthew 1933 hedgehog