Anxiety Butte (Chadronian) (Eocene of Canada)

Where: Saskatchewan, Canada (49.6° N, 108.8° W: paleocoordinates 51.2° N, 99.3° W)

• coordinate based on nearby landmark

When: Chadronian (37.2 - 33.9 Ma)

Environment/lithology: terrestrial

Primary reference: J. E. Storer. 1996. Eocene-Oligocene faunas of the Cypress Hills Formation, Saskatchewan. In D. R. Prothero and R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 240-261 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 16893: authorized by John Alroy, entered by John Alroy on 12.04.1997

Creative Commons license: CC BY (attribution)

Taxonomic list

• newly collected, stratigraphically controlled material only
 Perissodactyla - Brontotheriidae
Brontotheriidae indet. Marsh 1873 brontothere
 Perissodactyla - Hyracodontidae
Hyracodon priscidens Lambe 1905 odd-toed ungulate
 Perissodactyla - Equidae
Mesohippus westoni Cope 1889 anchitheriine horse
 Ungulata - Entelodontidae
Archaeotherium coarctatum Cope 1889 even-toed ungulate
 Ungulata - Camelidae
Poebrotherium sp. Leidy 1847 camel
 Ungulata - Agriochoeridae
Agriochoerus cf. antiquus Leidy 1850 agriochoerid
 Ungulata - Anthracotheriidae
Anthracotheriidae indet. Leidy 1869 anthracothere
 Ungulata - Leptomerycidae
"Pseudoprotoceras semicinctus" = Leptomeryx semicinctus, "Leptomeryx" speciosus
"Pseudoprotoceras semicinctus" = Leptomeryx semicinctus Cope 1889 ruminant
"Leptomeryx" speciosus Lambe 1908 ruminant