Simpson Quarry (Paleocene of the United States)

Where: Wheatland County, Montana (46.2° N, 109.9° W: paleocoordinates 53.1° N, 85.7° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Bear Formation, Puercan (66.0 - 63.3 Ma)

• "380 ft (115.8 m) above the top of the underlying Hell Creek Formation and 150 ft (45.7 m) below the contact with the overlying Lebo Formation"; this matches well with the estimate of "500-600 feet" for the Bear given by Simpson 1937a; I therefore have added 530 feet to all of Simpson's levels to extend his section to include the Bear

•said by Buckley 1993 to be somewhere within chron C29n

Environment/lithology: terrestrial

Primary reference: J. H. Hartman, G. A. Buckley, D. W. Krause and T. J. Kroeger. 1989. Paleontology, stratigraphy, and sedimentology of Simpson Quarry (early Paleocene), Crazy Mountains Basin, south-central Montana. Montana Geological Society Field Conference 173-185 [J. Alroy/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 14809: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Cimolesta - Cimolestidae
Cimolestes sp. Marsh 1889 eutherian
Cimolestes cf. incisus Marsh 1889 eutherian
Procerberus sp. Sloan and Van Valen 1965 eutherian
 Cimolesta - Palaeoryctidae
Palaeoryctidae indet. Winge 1917 eutherian
 Primates - Plesiadapidae
Plesiadapidae indet. Trouessart 1897 primate
said to be new
 Primates -
Purgatorius titusi n. sp.3 Buckley 1997 primate
 Primates - Purgatoriidae
Ursolestes perpetior n. gen. n. sp.4
Ursolestes perpetior n. gen. n. sp.4 Fox et al. 2015 primate
UMMP 100262 - holotype (left M2); referred specimens: UMMP 100253 (right dentary fragment with p4); UMMP 100258 (right dentary fragment with m2; alveoli for c1; p1–4, m1, m3); UMMP 100256 (left m1); UMMP 100260 (right m3); UMMP 100261 (left m3); UMMP 100263 (right M2); UMMP 100264 (right M3); UMMP 100265 (left M3)
 Condylarthra - Hyopsodontidae
"Mioclaenidae indet." = Hyopsodontidae
"Mioclaenidae indet." = Hyopsodontidae Trouessart 1879 condylarth
 Tribosphenida - Periptychidae
Periptychidae indet. Cope 1882 condylarth
said to be a new genus
Oxyacodon sp. Osborn and Earle 1895 condylarth
Anisonchus sp. Cope 1881 condylarth
probably OK
 Macroscelidea - Apheliscidae
Litomylus orthronepius Johnston and Fox 1984 elephant shrew
 Tribosphenida - Arctocyonidae
? Oxyprimus sp. Van Valen 1978 condylarth
Carcinodon aquilonius Russell 1974 condylarth
Protungulatum sp. Sloan and Van Valen 1965 condylarth
Loxolophus sp. Cope 1885 condylarth
sensu stricto
"Oxyclaenus simplex" = Protochriacus simplex Cope 1884 condylarth
Loxolophus pentacus1 Cope 1888 condylarth
Baioconodon cf. denverensis Gazin 1941 condylarth
 Didelphimorphia - Didelphidae
Didelphidae indet. Savage 1951 opossum
 Multituberculata -
? Cimexomys sp. Sloan and Van Valen 1965 multituberculate
 Multituberculata - Eucosmodontidae
Stygimys cf. camptorhiza Johnston and Fox 1984 multituberculate
 Multituberculata - Neoplagiaulacidae
Parectypodus sp. Jepsen 1930 multituberculate
Ectypodus sp. Matthew and Granger 1921 multituberculate
Mesodma thompsoni Clemens 1964 multituberculate
Mesodma formosa Marsh 1889 multituberculate
Neoplagiaulax sp. Lemoine 1882 multituberculate
said to be new
Neoplagiaulax kremnus Johnston and Fox 1984 multituberculate
 Multituberculata - Taeniolabididae
Catopsalis waddleae2 Buckley 1995 multituberculate