Split Rock (UCMP V-69192) (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 19075: authorized by John Alroy, entered by John Alroy on 27.09.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Reptilia
 Testudines - Testudinidae
Testudinidae indet.2 Batsch 1788 turtle
 Squamata - Anguidae
Gerrhonotus sp.2 Wiegmann 1828 alligator lizard
 Squamata - Colubridae
Natricinae indet.2 Bonaparte 1838 colubrid snake
Ameiseophis robinsoni2 Holman 1976 colubrid snake
 Squamata - Boidae
Calamagras weigeli2 Holman 1972 dwarf boa
Charina prebottae2 Brattstrom 1958 boa
 Squamata - Loxocemidae
Ogmophis cf. miocompactus2 Holman 1976 Mexican burrowing snake
 Squamata - Crotaphytidae
Crotaphytidae indet.3 Frost and Etheridge 1989 squamates
 Squamata - Iguanidae
Phrynosomatinae indet.3 Frost and Etheridge 1989 squamates
Mammalia
 Carnivora - Mustelidae
Mustelidae indet. Fischer 1817 mustelid carnivore
cf. Leptarctus sp. Leidy 1856 mustelid carnivore
 Carnivora - Canidae
Borophaginae indet.1 Simpson 1945 bone-crushing dog
Cynarctoides acridens Barbour and Cook 1914 bone-crushing dog
no specimens specifically tied to this locality by Wang et al. 1999
"Tomarctus kelloggi" = Paracynarctus kelloggi Merriam 1911 bone-crushing dog
confirmed by Wang et al. 1999
"Tomarctus optatus" = Protomarctus optatus Matthew 1924 bone-crushing dog
confirmed by Wang et al. 1999
 Perissodactyla - Equidae
Equinae indet.1 Steinmann and Döderlein 1890 horse
 Artiodactyla - Camelidae
 Artiodactyla - Merycoidodontidae
Brachycrus rusticus Leidy 1870 oreodont
 Artiodactyla - Antilocapridae
Merycodus cf. sabulonis Matthew and Cook 1909 pronghorn
Cosoryx (Paracosoryx) wilsoni Frick 1937 pronghorn
 Artiodactyla - Palaeomerycidae
cf. Barbouromeryx sp. Frick 1937 ruminant
 Theriamorpha - Soricidae
Limnoecus sp. Stirton 1930 shrew
 Theriamorpha - Talpidae
Scalopini indet. Dobson 1883 mole
 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
Schizodontomys harkseni Macdonald 1970 rodent
Perognathinae indet.1 Coues 1875 rodent
 Rodentia - Zapodidae
"Plesiosminthus sabrae" = Schaubeumys sabrae
"Plesiosminthus sabrae" = Schaubeumys sabrae Black 1958 jumping mouse
 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
 Lagomorpha - Ochotonidae
Oreolagus nebrascensis McGrew 1941 pika
 Lagomorpha - Leporidae