Simpson Quarry: Puercan, Montana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Multituberculata
? Cimexomys sp. Sloan and Van Valen 1965
Mammalia - Multituberculata - Eucosmodontidae
Stygimys cf. camptorhiza Johnston and Fox 1984
Mammalia - Multituberculata - Neoplagiaulacidae
Parectypodus sp. Jepsen 1930
Neoplagiaulax sp. Lemoine 1882
said to be new
Neoplagiaulax kremnus Johnston and Fox 1984
Ectypodus sp. Matthew and Granger 1921
Mesodma thompsoni Clemens 1964
Mesodma formosa (Marsh 1889)
Mammalia - Multituberculata - Taeniolabididae
Catopsalis sp. Cope 1882
3 specimens
(1 measurement)
    = Catopsalis waddleae Buckley 1995
Buckley 1995
type
Mammalia - Cimolestidae
Cimolestes sp. Marsh 1889
Cimolestes cf. incisus Marsh 1889
Procerberus sp. Sloan and Van Valen 1965
Mammalia - Proteutheria - Palaeoryctidae
Palaeoryctidae indet. Winge 1917
Mammalia - Macroscelidea - Apheliscidae
Litomylus orthronepius Johnston and Fox 1984
Mammalia - Condylarthra - Hyopsodontidae
Mioclaenidae indet. Osborn and Earle 1895
Mammalia - Periptychidae
Periptychidae indet. Cope 1882
said to be a new genus
Oxyacodon sp. Osborn and Earle 1895
Anisonchus sp. Cope 1881
probably OK
Mammalia - Procreodi - Arctocyonidae
? Oxyprimus sp. Van Valen 1978
Baioconodon cf. denverensis Gazin 1941
Loxolophus sp. Cope 1885
sensu stricto
Protogonodon pentacus (Cope 1888)
    = Loxolophus pentacus Cope 1888
Alroy 2002
Oxyclaenus simplex (Cope 1884)
Protungulatum sp. Sloan and Van Valen 1965
Carcinodon aquilonius Russell 1974
Mammalia - Primates - Purgatoriidae
Ursolestes perpetior n. gen., n. sp. Fox et al. 2015
Fox et al. 2015
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)
Purgatorius sp. Van Valen and Sloan 1965
    = Purgatorius titusi n. sp. Buckley 1997
Buckley 1997
Mammalia - Primates - Plesiadapidae
Plesiadapidae indet. Trouessart 1897
said to be new
Mammalia - Didelphimorphia - Didelphidae
Didelphidae indet. Gray 1821
see common names

Geography
Country:United States State/province:Montana County:Wheatland
Coordinates: 46.2° North, 109.9° West (view map)
Paleocoordinates:53.1° North, 85.7° West
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
Period: Paleogene Epoch: Paleocene
Stage: Danian 10 m.y. bin: Cenozoic 1
*Period:Tertiary
Key time interval: Puercan
Age range of interval: 66 - 63.8 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Bear
Local section:Crazy Local bed:380 ft
Local order:bottom to top
Stratigraphy comments: "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
Lithology and environment
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection size:650 specimens
Reason for describing collection:general faunal/floral analysis
Metadata
Database number:14809
Authorizer:J. Alroy, P. Mannion Enterer:J. Alroy, P. Mannion
Modifier:J. Alroy Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2007-11-16 16:58:24
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
1806. 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]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
1149 G. A. Buckley. 1995. The multituberculate Catopsalis from the early Paleocene of the Crazy Mountains Basin in Montana. Acta Palaeontologica Polonica 40(4):389-398 [J. Alroy/J. Alroy/P. Mannion]
1150 G. A. Buckley. 1997. A New Species of Purgatorius (Mammalia; Primatomorpha) from the Lower Paleocene Bear Formation, Crazy Mountains Basin, South-Central Montana. Journal of Paleontology 71(1) [J. Alroy/J. Alroy/J. Ju]
53671 R. C. Fox, C. S. Scott, and G. A. Buckley. 2015. A ‘giant’ purgatoriid (Plesiadapiformes) from the Paleocene of Montana, USA: mosaic evolution in the earliest primates. Palaeontology 58(2):277-291 [P. Mannion/P. Mannion/P. Mannion]