East of Rockyford (Protoceras Channels) (Oligocene of the United States)

Where: Shannon County, South Dakota (43.3° N, 102.5° W: paleocoordinates 44.3° N, 95.0° W)

• coordinate based on political unit

When: Poleslide Member (Brule Formation), Whitneyan (33.3 - 30.8 Ma)

Environment/lithology: terrestrial

Primary reference: C. E. Gawne. 1968. The genus Proterix (Insectivora, Erinaceidae) of the Upper Oligocene of North America. American Museum Novitates 2315 [J. Alroy/J. Alroy/J. Ju]more details

PaleoDB collection 17329: authorized by John Alroy, entered by John Alroy on 18.10.1995, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• possibly relevant: Merycoidodon bullatus - "Genetochoerus geygani" Schultz and Falkenbach 1968: "about five miles east of Rocky Ford Bridge" possibly in the "Upper Oreodon Zone"
Mammalia
 Rodentia - Castoridae
Agnotocastor praetereadens n. sp.6 Stirton 1935 beaver
from "Cheyenne River, White River formation, South Dakota"; referred specimens from "near Rockyford" mentioned by Xu 1996
 Theriamorpha - Erinaceidae
Proterix loomisi Matthew 1903 hedgehog
from "7 mi. E of Rockyford, Shannon Co."
Proterix bicuspis2 Macdonald 1951 hedgehog
 Perissodactyla - Tapiridae
Protapirus simplex1 Wortman and Earle 1893 tapir
SDSM specimen from Protoceras sandstones 12 km (= 7 mi) E of Rockyford
 Artiodactyla - Leptochoeridae
Leptochoerus supremus n. sp.5 Macdonald 1955 even-toed ungulate
from "7 mi. E of Rockyford, Shannon Co."
 Artiodactyla - Merycoidodontidae
Leptauchenia major2 Leidy 1856 oreodont
 Carnivora - Nimravidae
Nimravus brachyops2 Cope 1878 false sabre-tooth
 Carnivora - Canidae
Oxetocyon cuspidatus n. sp.4 Green 1954 bone-crushing dog
from "7 mi. E of Rockyford, Shannon Co."
Aves
 Gruiformes - Bathornithidae
Bathornis geographicus3 Wetmore 1942 bird
S.D.S.M. No. 40155