Peanut Peak Microfauna (Eocene of the United States)

Where: Shannon County, South Dakota (43.3° N, 102.5° W: paleocoordinates 44.6° N, 93.7° W)

• coordinate based on political unit

When: upper Member (Chadron Formation), Chadronian (37.2 - 33.9 Ma)

Environment/lithology: terrestrial

Primary reference: J. Clark and J. R. Beerbower. 1967. Geology, paleoecology, and paleoclimatology of the Chadron Formation. Fieldiana 5(5):21-74 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 17007: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• from a single locality in Big Corral Draw
Aves
 Ornithurae -
Passeriformes indet. Linnaeus 1758 perching bird
Reptilia
 Squamata -
Peltosaurus sp. Cope 1872 squamates
Mammalia
 Leptictida - Leptictidae
Leptictis dakotensis Leidy 1868 eutherian
 Rodentia - Eomyidae
Paradjidaumo trilophus Cope 1873 rodent
Adjidaumo minutus Cope 1873 rodent
 Rodentia - Eutypomyidae
Eutypomys cf. thomsoni Matthew 1905 rodent
 Lagomorpha - Leporidae
Megalagus turgidus Cope 1873 rabbit
 Lipotyphla - Geolabididae
Centetodon magnus Clark 1936 placental
 Tribosphenida - Apternodontidae
Oligoryctes altitalonidus Clark 1936 placental
 Tribosphenida - Micropternodontidae
Clinopternodus gracilis Clark 1936 placental
 Carnivora - Canidae
Hesperocyon gregarius Cope 1873 canid
 Insectivora - Apatemyidae
Sinclairella dakotensis Jepsen 1934 insectivoran
 Didelphimorphia - Didelphidae