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

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Osteichthyes
Osteichthyes - Testudines
Hutchison 2009 5 specimens
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)
Joyce et al. 2009
Judithemys backmani (Russell 1934)
Brinkman et al. 2010 2 specimens
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”
Osteichthyes
1 specimen
nearly complete skeleton
see common names

Geography
Country:United States State/province:Montana County:Carbon
Coordinates: 45.2° North, 109.0° West (view map)
Paleocoordinates:53.6° North, 78.3° West (Wright 2013)
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
Period: Paleogene Epoch: Paleocene
Stage: Thanetian 10 m.y. bin: Cenozoic 1
Key time interval: Clarkforkian
Age range of interval: 57.5 - 56 m.y. ago
Stratigraphy
Formation:Fort Union Member:Tongue River
Stratigraphic resolution:bed
Stratigraphy comments: Bear Creek Local Fauna, Clarkforkian 1
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
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
Metadata
Also known as:Princeton University
Database number:137834
Authorizer:P. Mannion, A. Dunhill Enterer:P. Mannion, B. Allen
Modifier:M. Carrano Research group:vertebrate
Created:2012-12-21 23:05:23 Last modified:2025-02-22 15:12:02
Access level:the public Released:2012-12-21 23:05:23
Creative Commons license:CC0
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]
82442 A. D. Gentry, C. R. Kiernan, and J. F. Parham. 2023. A large non-marine turtle from the Upper Cretaceous of Alabama and a review of North American “macrobaenids”. The Anatomical Record 306(6):1411-1430 [E. Vlachos/E. Vlachos/M. Carrano]
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]