Togwotee Pass Summit (Eocene of the United States)

Where: Teton County, Wyoming (43.9° N, 110.8° W: paleocoordinates 47.9° N, 96.6° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: ? Tepee Trail Formation, Bridgerian (50.3 - 46.2 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; volcaniclastic sediments

Size classes: macrofossils, mesofossils

Collection methods: bulk,

Primary reference: M. C. McKenna. 1972. Vertebrate paleontology of the Togwotee Pass area, northwestern Wyoming. In R. M. West (ed.), Field Conference on Tertiary Biostratigraphy of Southern and Western Wyoming, August 5-10, 1972 80-101 [M. Carrano/M. Carrano]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 16438: authorized by John Alroy, entered by John Alroy on 30.04.1994, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• KA dates of 47.8 (=49.0) +/- 1.3 (sanidine) and 47.9 (=49.1) +/- 1.3 (biotite) on sample 1.8 km NNW of pass, beneath the level of the fauna
said to be equivalent to Bridger A-B
Show authors, comments, and common names
Gnathostomata
  -
Osteichthyes indet.
Mammalia
 Condylarthra - Hyopsodontidae
Hyopsodus sp.
Hyopsodus sp. Leidy 1870 condylarth
 Perissodactyla - Hyrachyidae
Hyrachyus eximius
Hyrachyus eximius Leidy 1871 odd-toed ungulate
 Perissodactyla - Brontotheriidae
Brontotheriidae indet.1
Brontotheriidae indet.1 Marsh 1873 brontothere
 Perissodactyla - Equidae
cf. Orohippus sp.
cf. Orohippus sp. Marsh 1872 horse
 Placentalia -
Artiodactyla indet.2, ? Carnivora indet.
Artiodactyla indet.2 even-toed ungulate
? Carnivora indet. Bowdich 1821 carnivoran
two forms
 Carnivora - Miacidae
Miacinae indet.
Miacinae indet. Cope 1880 carnivoran
 Primates - Microsyopidae
Microsyops cf. elegans
Microsyops cf. elegans Marsh 1871 primate
or annectens
 Primates - Omomyidae
Washakius sp.
Washakius sp. Leidy 1873 tarsier
 Rodentia - Reithroparamyidae
cf. Reithroparamys sp.2
cf. Reithroparamys sp.2 Matthew 1920 rodent
 Rodentia - Ischyromyidae
Ischyromyidae indet.
Ischyromyidae indet. Alston 1876 rodent
two forms: small
 Rodentia - Sciuravidae
Tillomys sp., Sciuravus sp.
Tillomys sp. Marsh 1872 rodent
Sciuravus sp. Marsh 1871 rodent
 Insectivora -
Insectivora indet.2
Insectivora indet.2 Bowdich 1821 insectivoran
small
 Cimolesta - Esthonychidae
cf. Trogosus sp.
cf. Trogosus sp. Leidy 1871 tillodont
Reptilia
 Squamata -
Lacertilia indet.
 Squamata - Anguidae
Glyptosaurus sp.
Glyptosaurus sp. Marsh 1871 squamates
 Loricata -
Crocodylia indet.
Crocodylia indet. crocodilian
 Testudinata -
Testudinata indet.
Scenopagus
  -
? Scenopagus sp.
? Scenopagus sp. McKenna and Simpson 1959
1Alroy 2002; 2McKenna 1980