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
Gnathostomata
  -
Reptilia
 Loricata -
Crocodylia indet. crocodilian
 Testudinata -
 Squamata - Anguidae
Glyptosaurus sp. Marsh 1871 squamates
 Squamata -
Mammalia
 Cimolesta - Esthonychidae
cf. Trogosus sp. Leidy 1871 tillodont
 Insectivora -
Insectivora indet.2 Bowdich 1821 insectivoran
small
 Condylarthra - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
 Placentalia -
? Carnivora indet. Bowdich 1821 carnivoran
two forms
 Carnivora - Miacidae
Miacinae indet. Cope 1880 carnivoran
 Perissodactyla - Equidae
cf. Orohippus sp. Marsh 1872 horse
 Perissodactyla - Hyrachyidae
Hyrachyus eximius Leidy 1871 odd-toed ungulate
 Perissodactyla - Brontotheriidae
Brontotheriidae indet.1 Marsh 1873 brontothere
 Placentalia -
Artiodactyla indet.2 even-toed ungulate
 Rodentia - Reithroparamyidae
cf. Reithroparamys sp.2 Matthew 1920 rodent
 Rodentia - Ischyromyidae
Ischyromyidae indet. Alston 1876 rodent
two forms: small
 Rodentia - Sciuravidae
Tillomys sp. Marsh 1872 rodent
Sciuravus sp. Marsh 1871 rodent
 Primates - Omomyidae
Washakius sp. Leidy 1873 tarsier
 Primates - Microsyopidae
Microsyops cf. elegans Marsh 1871 primate
or annectens
Scenopagus
  -
? Scenopagus sp. McKenna and Simpson 1959