Black's Fork (Eocene of the United States)

Where: Uinta County, Wyoming (41.2° N, 110.5° W: paleocoordinates 45.2° N, 96.8° W)

• coordinate based on political unit

When: lower Member (Bridger Formation), Bridgerian (50.3 - 46.2 Ma)

Environment/lithology: terrestrial

Primary reference: C. L. Gazin. 1976. Mammalian Faunal Zones of the Bridger Middle Eocene. Smithsonian Contributions to Paleobiology 26:1-25 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 16136: authorized by John Alroy, entered by John Alroy on 15.05.2002, edited by Roger Benson, Terri Cleary and Evangelos Vlachos

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Squamata -
Saniwa ensidens3 Leidy 1870 squamates
USNM 4128, 12 dorsal vertebrae and numerous fragments
 Testudines -
Emys latilabiatus n. sp.1 Cope 1871 turtle
 Testudines - Trionychidae
Axestemys byssinus n. gen. n. sp.7
Axestemys byssinus n. gen. n. sp.7 Cope 1872 softshell turtle
Holotype USNM 4089, xiphiplastron, cervical vertebra, isolated ilium, several fragmentary appendicular elements
Mammalia
 Creodonta - Hyaenodontidae
Sinopa rapax6 Leidy 1871 creodont
 Theriamorpha -
Miacis parvivorus n. sp. Cope 1872 placental
from Pinnacle Rock according to Wang and Tedford 1994
 Perissodactyla - Equidae
Orohippus pumilus4 Marsh 1871 horse
 Perissodactyla - Hyrachyidae
Hyrachyus modestus9 Leidy 1870 odd-toed ungulate
 Artiodactyla - Homacodontidae
Antiacodon pygmaeus8 Cope 1872 even-toed ungulate
Bridger B "East of Black's Fork Bridge"
Microsus cuspidatus n. sp. Leidy 1870 even-toed ungulate
 Theriamorpha - Pantolestoidae
Pantolestes longicaudus n. sp. Cope 1872 placental
 Primates - Notharctidae
"Notharctus tenebrosus n. sp." = Notharctus tenebrosus, "Tomitherium rostratum n. gen. n. sp." = Notharctus tenebrosus1
"Notharctus tenebrosus n. sp." = Notharctus tenebrosus Leidy 1870 primate
from Bridger B; type of "Tomitherium rostratum" also is from Black's Fork: Granger and Gregory 1917, Gazin 1958a
"Tomitherium rostratum n. gen. n. sp." = Notharctus tenebrosus1 Leidy 1870 primate
 Primates - Omomyidae
Washakius insignis2 Leidy 1873 tarsier
Bridger B
Anaptomorphus aemulus2 Cope 1872 tarsier
Scenopagus edenensis
  -
Scenopagus edenensis5 McGrew et al. 1959
lower Bridger