Burns Mine (Bear Creek): Clarkforkian, Montana
collected by Princeton University 1950

List of taxa
Where & when
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Testudines
Judithemys backmani (Russell 1934)
Brinkman et al. 2010
YPM VPPU 016235 (a nearly complete, though heavily fractured, carapace and plastron) and YPM VPPU 016237 (a heavily fragmented carapace, left epiplastron, and right hypoplastron); initially identified as Protochelydra sp., but examination of the material by Parham (2005) indicated that both turtles belong to “Macrobaenidae”
Hutchemys arctochelys n. sp. Joyce et al. 2009
YPM PU 16319 - type (a nearly complete carapace); paratypes: YPM PU 16320 (nearly complete carapace); YPM PU 16321 (nearly complete plastron lacking epiplastra); YPM PU 16322 (nearly complete plastron lacking epiplastra); YPM PU 16238 (partial plastron consisting of left hyoplastron, left xiphiplastron, and a partial left hypoplastron and various costal fragments)
    = Plastomenoides lamberti Hutchison 2009
Hutchison 2009
    = Hutchemys arctochelys n. sp. Joyce et al. 2009
Vitek and Joyce 2015
Champsosaurus sp. Cope 1876
nearly complete skeleton
Titanoides sp. Gidley 1917
see common names

Country:United States State/province:Montana County:Carbon
Coordinates: 45.2° North, 109.0° West (view map)
Paleocoordinates:50.6° North, 90.1° West
Basis of coordinate:based on political unit
Geographic resolution:small collection
Period:Paleogene Epoch:Paleocene
Stage:Thanetian 10 m.y. bin:Cenozoic 1
Key time interval:Clarkforkian
Age range of interval:56.80000 - 55.80000 m.y. ago
Formation:Fort Union Member:Tongue River
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Museum repositories:YPM
Collectors:Princeton University Collection dates:1950s
Also known as:Princeton University
Database number:137834
Authorizer:P. Mannion, P. Holroyd, A. Dunhill Enterer:P. Mannion, P. Holroyd, B. Allen
Modifier:P. Mannion Research group:vertebrate
Created:2012-12-21 23:05:23 Last modified:2012-12-21 06:27:01
Access level:the public Released:2012-12-21 23:05:23
Creative Commons license:CC BY
Reference information

Primary reference:

44082. W. G. Joyce, A. Revan, T. R. Lyson and I. G. Danilov. 2009. Two new plastomenine softshell turtles from the Paleocene of Montana and Wyoming. Bulletin of the Peabody Museum of Natural History 50(2):307-325 [P. Mannion/P. Mannion]

Secondary references:

44081 D. B. Brinkman, M. J. Densmore, and W. G. Joyce. 2010. “Macrobaenidae” (Testudines: Eucryptodira) from the Late Paleocene (Clarkforkian) of Montana and the taxonomic treatment of “Clemmys” backmani. Bulletin of the Peabody Museum of Natural History 51(2):147-155 [P. Mannion/P. Mannion]
58298 J. H. Hutchison. 2009. New soft-shelled turtles (Plastomeninae, Trionychidae, Testudines) from the Cretaceous and Paleocene of North America. PaleoBios 29(2):36-47 [P. Holroyd/P. Holroyd]
63467 N. S. Vitek and W. G. Joyce. 2015. A Review of the Fossil Record of New World Turtles of the Clade Pan-Trionychidae. Bulletin of the Peabody Museum of Natural History 56(2):185-244 [P. Mannion/P. Mannion]