Toadstool Park (Eocene of the United States)

Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.8° N, 95.1° W)

• coordinate based on political unit

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

Environment/lithology: terrestrial

Primary reference: D. R. Prothero, C. R. Farmer, and H. G. Farmer. 1982. Oligocene calibration of the magnetic polarity time scale. Geology 10(12):650-653 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 17031: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• referred to as "Pine Ridge"; Ostrander 1985 explains that this is in Toadstool Park
this list is apparently based on Prothero's thesis

Hunt 1987 gives coordinate as SE 1/4 NE 1/4 sec 8 T33N R53W 15 mi. NW of Crawford, Dawes Co.; this is in Sioux Co.
Mammalia
 Artiodactyla - Oromerycidae
Eotylopus reedi Matthew 1910 even-toed ungulate
 Artiodactyla - Camelidae
Poebrotherium eximium Hay 1902 camel
 Artiodactyla - Protoceratidae
"Leptotragulus profectus" = Trigenicus profectus
"Leptotragulus profectus" = Trigenicus profectus Matthew 1903 protoceratid
 Artiodactyla - Leptomerycidae
Leptomeryx speciosus Lambe 1908 ruminant
 Rodentia - Ischyromyidae
Ischyromyidae indet. Alston 1876 rodent
Ischyromys veterior Matthew 1903 rodent
 Rodentia - Eomyidae
Yoderimyinae indet. Wood 1955 rodent
 Rodentia - Cylindrodontidae
Cylindrodon sp. Douglass 1902 rodent
 Lagomorpha - Leporidae
Megalagus brachyodon Matthew 1903 rabbit
Palaeolagus temnodon Douglass 1902 rabbit