Missouri Breaks (UC-913) (Cretaceous to of the United States)

Where: Fergus County, Montana (47.7° N, 109.0° W: paleocoordinates 54.7° N, 75.1° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Judith River Formation (Montana Group), Middle Campanian to Middle Campanian (83.5 - 70.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: channel lag; sandstone

• "channel-lag deposit"

Size class: mesofossils

Primary reference: R. W. Blob, M. T. Carrano, R. R. Rogers, C. A. Forster, and N. R. Espinoza. 2001. A new fossil frog from the Upper Cretaceous Judith River Formation of Montana. Journal of Vertebrate Paleontology 21(1):190-194 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 23549: authorized by John Alroy, entered by John Alroy on 16.07.2002, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• only a single taxon is listed; others clearly are present
Show authors, comments, and common names
Amphibia
 Caudata - Urodela
Nezpercius dodsoni n. gen. n. sp., Scapherpeton sp.
Nezpercius dodsoni n. gen. n. sp. Blob et al. 2001 salamander
Anura, family unknown
Scapherpeton sp. Cope 1876 salamander
 Proteida - Batrachosauroididae
Opisthotriton kayi, Prodesmodon sp.
Opisthotriton kayi Auffenberg 1961 salamander
Prodesmodon sp. Estes 1964 salamander