Also known as Simpson's Locality 56
Where: Sweetgrass County, Montana (45.8° N, 109.8° W: paleocoordinates 51.8° N, 89.1° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: Melville Formation, Tiffanian (61.7 - 56.8 Ma)
• in a stratigraphically isolated reversed polarity zone interpreted as chron C26r: Butler et al. 1987
•Scarritt Quarry, (early Tiffanian, Ti2) Melville Formation, eastern Crazy Mountains Basin, Montana, USA
Environment/lithology: terrestrial; lithology not reported
Size classes: macrofossils, mesofossils
Collected by D.R. Krause in 1985
Collection methods: quarrying, surface (in situ),
Primary reference: D. W. Krause and M. C. Maas. 1990. The biogeographic origins of late Paleocene - early Eocene mammalian immigrants to the Western Interior of North America. Geological Society of America Special Paper 243:71-105 [J. Alroy/J. Alroy/M. Uhen]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 15064: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Roger Benson
Creative Commons license: CC BY (attribution)
Taxonomic list
exact NISP counts are given and sum to 772; however, Hartman and Krause 1993 state that there are "over 1000 identifiable specimens"
many of the types are described in Simpson 1936c
Reptilia | |
Axestemys montinsana n. sp.3
Axestemys montinsana n. sp.3 Vitek 2012 softshell turtle Holotype UMMP 27029, a skull, partial lower jaw, partial carapace, fragmentary entoplastron, hyoplastron, and hypoplastron, xiphiplastron, five cervical vertebrae, a partial pelvic girdle, two humeri, a femur, and various disarticulated appendicular elements
| |
Mammalia | |
Pararyctes pattersoni Van Valen 1966 eutherian | |
Unuchinia asaphes n. sp.
Unuchinia asaphes n. sp. Simpson 1936 eutherian | |
| |
Titanoides sp. Gidley 1917 pantodont | |
Paleotomus senior n. sp. Simpson 1937 eutherian
Paleotomus senior2 Simpson 1937 eutherian AMNH 33991 - type (Right M1); referred specimen: AMNH 33828 (Right M2); considered a junior synonym of Paleotomus senior by Krause and Gingerich 1983
| |
Litocherus notissimus n. sp.
Litocherus notissimus n. sp. Simpson 1936 elephant shrew | |
Protictis sp. Matthew placental | |
Dissacus sp. Cope 1881 condylarth | |
Thryptacodon cf. australis Simpson 1935 condylarth
Chriacus cf. pelvidens Cope 1881 condylarth | |
Leptacodon cf. tener Matthew and Granger 1921 placental | |
| |
Plesiadapis anceps n. sp., Nannodectes sp.
Plesiadapis anceps n. sp. Simpson 1936 primate
Nannodectes sp. Gingerich 1975 primate | |
Carpodaptes hazelae n. sp.
Carpodaptes hazelae n. sp. Simpson 1936 primate | |
Ignacius frugivorus Matthew and Granger 1921 primate | |
Mesodma pygmaea Sloan 1987 multituberculate
Neoplagiaulax hunteri n. sp. Simpson 1936 multituberculate
Ectypodus cf. powelli Jepsen 1940 multituberculate | |
Ptilodus sp. Cope 1881 multituberculate two species, both said to be new; one of them is P. sp. "C" according to Gunnell 1994
|