Split Rock (UCMP V-77144) (Miocene of the United States)

Where: Natrona County, Wyoming (43.2° N, 107.1° W: paleocoordinates 44.0° N, 103.2° 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 19076: 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.3 Wiegmann 1828 alligator lizard
Mammalia
 Placentalia -
Carnivora indet. Bowdich 1821 carnivoran
 Carnivora - Canidae
Cynarctoides acridens Barbour and Cook 1914 bone-crushing dog
no specimens specifically tied to this locality by Wang et al. 1999
 Artiodactyla - Merycoidodontidae
Brachycrus sp. Matthew 1901 oreodont
 Theriamorpha - Soricidae
Limnoecus sp. Stirton 1930 shrew
 Theriamorpha - Proscalopidae
Mesoscalops scopelotemos Reed 1960 placental
 Theriamorpha - Erinaceidae
Parvericius montanus Koerner 1940 hedgehog
Brachyerix macrotis Matthew 1933 hedgehog
 Rodentia - Sciuridae
Protospermophilus kelloggi Black 1963 squirrel
Miospermophilus wyomingensis Black 1963 squirrel
 Rodentia -
Geomyoidea indet.1 Bonaparte 1845 rodent
 Rodentia - Heteromyidae
Harrymys woodi Black 1961 rodent
Harrymys irvini Munthe 1988 rodent
 Rodentia - Zapodidae
Schaubeumys sabrae1 Black 1958 jumping mouse
 Rodentia - Mylagaulidae
Galbreathia novellus1 Matthew 1924 rodent
Alphagaulus vetus2 Matthew 1924 rodent
 Lagomorpha - Ochotonidae
Oreolagus nebrascensis McGrew 1941 pika
 Lagomorpha - Leporidae