Capitol Rock (Upper) (Eocene of the United States)

Where: Carter County, Montana (45.8° N, 104.4° W: paleocoordinates 47.2° N, 95.3° W)

• coordinate based on political unit

When: Chadronian (37.2 - 33.9 Ma)

Environment/lithology: terrestrial

Primary reference: B. J. Mader and J. P. Alexander. 1995. Megacerops kuwagatarhinus n. sp., an Unusual Brontothere (Mammalia, Perissodactyla) with Distally Forked Horns. Journal of Paleontology 69(3):581-587 [J. Alroy/J. Alroy/J. Ju]more details

PaleoDB collection 16927: authorized by John Alroy, entered by John Alroy on 18.10.1995

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Carnivora - Canidae
Hesperocyon sp.
Hesperocyon sp. Scott 1890 canid
 Artiodactyla - Leptomerycidae
Leptomeryx sp.
Leptomeryx sp. Leidy 1853 ruminant
 Perissodactyla - Brontotheriidae
Brontotheriidae indet.
Brontotheriidae indet. Marsh 1873 brontothere
 Perissodactyla - Equidae
Mesohippus sp.
Mesohippus sp. Marsh 1875 anchitheriine horse
 Perissodactyla - Hyracodontidae
Hyracodon sp.
Hyracodon sp. Leidy 1856 odd-toed ungulate
 Rodentia - Ischyromyidae
Ischyromys sp.
Ischyromys sp. Leidy 1856 rodent