Opal (UM BB-6) (Eocene of the United States)

Where: Lincoln County, Wyoming (41.8° N, 110.7° W: paleocoordinates 45.9° N, 96.9° W)

• coordinate based on political unit

• small collection-level geographic resolution

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

Environment/lithology: terrestrial

Primary reference: G. F. Gunnell. 1998. Mammalian Fauna From the Lower Bridger Formation (Bridger A, Early Middle Eocene) of the Southern Green River Basin, Wyoming. Contributions from the Museum of Paleontology, University of Michigan 30(3):83-130 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 16305: authorized by John Alroy, entered by John Alroy on 21.09.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Primates - Microsyopidae
Microsyops cf. elegans Marsh 1871 primate
 Primates - Omomyidae
Anaptomorphus westi Szalay 1976 tarsier
Trogolemur cf. amplior Beard et al. 1992 tarsier
Omomys carteri Leidy 1869 tarsier
Washakius insignis Leidy 1873 tarsier
 Primates - Notharctidae
Notharctus robinsoni Gingerich 1979 primate
Smilodectes mcgrewi Gingerich 1979 primate
 Glires -
 Rodentia - Sciuravidae
Sciuravus nitidus Marsh 1871 rodent
 Rodentia - Ischyromyidae
Microparamys cf. minutus Wilson 1937 rodent
Thisbemys corrugatus Wood 1959 rodent
Leptotomus parvus Wood 1959 rodent
 Perissodactyla - Hyrachyidae
Hyrachyus sp. Leidy 1871 odd-toed ungulate
 Ferae - Viverravidae
Viverravus minutus Wortman 1901 placental
 Ferae - Epoicotheriidae
Tetrapassalus sp. Simpson 1959 placental
 Ferae - Metacheiromyidae
Metacheiromys sp. Wortman 1903 placental
Brachianodon westorum Gunnell and Gingerich 1993 placental
 Macroscelidea - Amphilemuridae
Scenopagus curtidens Matthew 1909 elephant shrew
Scenopagus edenensis McGrew et al. 1959 elephant shrew
 Ungulata - Homacodontidae
Homacodontidae indet. Marsh 1849 even-toed ungulate
Microsus cuspidatus Leidy 1870 even-toed ungulate
 Hyaenodonta - Hyaenodontidae
Sinopa rapax Leidy 1871 eutherian
 Theriiformes - Herpetotheriidae
"Herpetotherium marsupium" = Peratherium marsupium
"Herpetotherium marsupium" = Peratherium marsupium Troxell 1923 marsupial