Tavenner Ranch 2 ( of the United States)

Also known as KU-Mt-21; Locality 1 of Wood and Konizeski 1965; MV-6550

Where: Powell County, Montana (46.4° N, 112.8° W: paleocoordinates 47.5° N, 106.9° W)

• coordinate based on political unit

When: Upper Cabbage Patch Beds Member (Renova Formation), Arikareean (29.5 - 18.5 Ma)

Environment/lithology: terrestrial

Primary reference: T. H. V. Rich and D. L. Rasmussen. 1973. New North American erinaceine hedgehogs (Mammalia; Insectivora). Occasional Papers of the Museum of Natural History, University of Kansas 21:1-54 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 17700: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• said to be "medial Arikareean"
"Upper Cabbage Patch" list of Rasmussen 1989 matches this one quite well and I assume it pertains largely or perhaps entirely to Tavenner Ranch 2
this is NOT Locality 4 of Wood and Konizeski 1965; however, Wood and Konizeski Locality 5 is from the same horizon only a few hundred yards away, and lithology matches that given by Pierce and Rasmussen
"? Parasminthus sp." is not documented in North America, see Korth 1994c
Mammalia
 Carnivora - Canidae
Canidae indet.1 Fischer de Waldheim 1817 canid
 Perissodactyla - Equidae
Miohippus cf. gemmarosae3 Osborn 1918 anchitheriine horse
 Artiodactyla - Merycoidodontidae
Merycoidodontidae indet. Cook 1912 oreodont
said to be indeterminate by Rasmussen 1989, although "Promerycochoerus montanus" was listed by Wood and Konizeski 1965
 Artiodactyla - Leptomerycidae
Pronodens sp.2 Koerner 1940 ruminant
 Theriamorpha - Proscalopidae
Proscalops sp. Matthew 1901 placental
 Theriamorpha - Soricidae
Domnina sp. Cope 1873 shrew
 Theriamorpha - Erinaceidae
Stenoechinus tantalus n. sp. Rich and Rasmussen 1973 hedgehog
Amphechinus horncloudi Macdonald 1970 hedgehog
 Lagomorpha - Ochotonidae
? Gripholagomys sp.2 Green 1972 pika
 Rodentia - Zapodidae
Zapodidae indet.1 Coues 1875 jumping mouse
 Rodentia - Cricetidae
Leidymys sp. Wood 1936 mouse
Paciculus sp. Cope 1879 mouse
 Rodentia - Entoptychidae
Gregorymys douglassi3 Wood 1936 rodent
 Rodentia - Aplodontidae
Meniscomys sp. Cope 1878 mountain beaver
Niglarodon sp. Black 1961 mountain beaver
 Rodentia - Sciuridae
Sciuridae indet.2 Gray 1821 squirrel
 Rodentia - Castoridae
Castoridae indet.2 Gray 1821 beaver
? Euhapsis sp.2 Peterson 1905 beaver
 Rodentia - Eutypomyidae
Eutypomys montanensis n. sp.3 Wood and Konizeski 1965 rodent
from "Locality 5"; not clear why Eutypomys is omitted by Rasmussen, as this i.d. is even repeated by Tedford et al. 1987; see above comments on localities
 Rodentia - Geomyidae
? Tenudomys sp.2 Rensberger 1973 pocket gopher
may include "Mookomys sp."
 Rodentia - Eomyidae
Eomyidae indet.2 Winge 1887 rodent
 Theriamorpha - Peradectidae
Nanodelphys sp. McGrew 1937 marsupial
 Theriamorpha - Herpetotheriidae
"Herpetotheriinae indet." = Herpetotheriidae1
"Herpetotheriinae indet." = Herpetotheriidae1 Trouessart 1879 marsupial