Spring Creek 1 (Level 1) ( of the United States)

Also known as UWBM A5867-1

Where: Meagher County, Montana (46.5° N, 111.0° W: paleocoordinates 47.6° N, 105.1° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Deep River Formation, Arikareean (29.5 - 18.5 Ma)

• said to be early Arikareean

Environment/lithology: terrestrial

Primary reference: A. D. Barnosky. 1982. A New Species of Proscalops (Mammalia, Insectivora) from the Arikareean Deep River Formation, Meagher County, Montana. Journal of Paleontology 56(5) [J. Alroy/J. Alroy/J. Ju]more details

PaleoDB collection 17695: authorized by John Alroy, entered by John Alroy on 26.07.1994

Creative Commons license: CC BY (attribution)

Taxonomic list

• secs 14, 23 T10N R5E
underlies UWBM A5867-2
Show authors, comments, and common names
Mammalia
 Theriamorpha - Proscalopidae
Proscalops intermedius n. sp.
Proscalops intermedius n. sp. Barnosky 1982 placental
 Rodentia - Mylagaulidae
Trilaccogaulus montanensis1
Trilaccogaulus montanensis1 Rensberger 1979 rodent
 Rodentia - Entoptychidae
Gregorymys sp.
Gregorymys sp. Wood 1936 rodent
 Rodentia - Aplodontidae
Niglarodon loneyi n. sp.2, Niglarodon progressus2, Niglarodon blacki n. sp.2
Niglarodon loneyi n. sp.2 Rensberger 1981 mountain beaver
Niglarodon progressus2 Rensberger 1981 mountain beaver
Niglarodon blacki n. sp.2 Rensberger 1981 mountain beaver
1Alroy 2002; 2Rensberger 1981