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
 Testudines - Pantrionychidae
Axestemys byssinus n. gen. n. sp.7
Axestemys byssinus n. gen. n. sp.7 Cope 1871 turtle
Holotype USNM 4089, xiphiplastron, cervical vertebra, isolated ilium, several fragmentary appendicular elements
 Testudines -
Emys latilabiatus n. sp.1 Cope 1871 turtle
 Squamata -
Saniwa ensidens3 Leidy 1870 squamates
USNM 4128, 12 dorsal vertebrae and numerous fragments
Mammalia
 Primates - Omomyidae
Anaptomorphus aemulus2 Cope 1872 tarsier
Washakius insignis2 Leidy 1873 tarsier
Bridger B
 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
 Cimolesta - Pantolestidae
"Pantolestes longicaudus n. sp." = Pantolestes longieundus
"Pantolestes longicaudus n. sp." = Pantolestes longieundus Cope 1872 eutherian
 Perissodactyla - Hyrachyidae
Hyrachyus modestus9 Leidy 1870 odd-toed ungulate
 Perissodactyla - Equidae
Orohippus pumilus4 Marsh 1871 horse
 Carnivora - Miacidae
Miacis parvivorus n. sp. Cope 1872 carnivoran
from Pinnacle Rock according to Wang and Tedford 1994
 Macroscelidea - Amphilemuridae
Scenopagus edenensis5 McGrew et al. 1959 elephant shrew
lower Bridger
 Ungulata - 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
 Hyaenodonta - Hyaenodontidae
Sinopa rapax6 Leidy 1871 eutherian