Anxiety Butte (SMNH 72F10-0049) (Oligocene to of Canada)

Where: Saskatchewan, Canada (49.8° N, 109.0° W: paleocoordinates 50.9° N, 101.9° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Cypress Hills Formation, Whitneyan to Whitneyan (33.3 - 24.8 Ma)

• said to be Whitneyan to early Arikareean = Geringian or Monroecreekian

Environment/lithology: terrestrial

Primary reference: J. E. Storer and H. N. Bryant. 1993. Biostratigraphy of the Cypress Hills Formation (Eocene to Miocene), Saskatchewan: equid types (Mammalia: Perissodactyla) and associated faunal assemblages. Journal of Paleontology 67(4):660-669 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 17306: authorized by John Alroy, entered by John Alroy on 07.06.1994

Creative Commons license: CC BY (attribution)

Taxonomic list

• additional records of Storer 1996 are from three localities at this stratigraphic level, one of them presumably being SMNH 72F10-0049
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Mammalia
 Carnivora - Canidae
? Hesperocyon sp.
? Hesperocyon sp. Scott 1890 canid
 Perissodactyla - Equidae
Miohippus sp., Miohippus assiniboiensis, Miohippus cf. intermedius
Miohippus sp. Marsh 1874 anchitheriine horse
Miohippus assiniboiensis Lambe 1905 anchitheriine horse
Miohippus cf. intermedius Osborn and Wortman 1895 anchitheriine horse
 Perissodactyla - Rhinocerotidae
Subhyracodon sp., Diceratherium armatum
Subhyracodon sp. Wood 1927 rhinoceros
Diceratherium armatum Marsh 1875 rhinoceros
 Artiodactyla - Entelodontidae
Megachoerus cf. zygomaticus
Megachoerus cf. zygomaticus Troxell 1920 even-toed ungulate
 Artiodactyla - Anthracotheriidae
Elomeryx armatus
Elomeryx armatus Marsh 1894 anthracothere
 Artiodactyla - Protoceratidae
Protoceras celer
Protoceras celer Marsh 1891 protoceratid
 Artiodactyla - Leptomerycidae
Leptomeryx sp.
Leptomeryx sp. Leidy 1853 ruminant
 Artiodactyla - Agriochoeridae
Agriochoerus sp.
Agriochoerus sp. Leidy 1850 agriochoerid
 Artiodactyla - Camelidae
Poebrotherium sp.
Poebrotherium sp. Leidy 1847 camel
 Artiodactyla - Merycoidodontidae
Merycoidodon (Anomerycoidodon) sp.
Merycoidodon (Anomerycoidodon) sp. Schultz and Falkenbach 1968 oreodont
 Lagomorpha - Leporidae
Palaeolagus cf. burkei
Palaeolagus cf. burkei Schlaikjer 1935 rabbit