mouth of Dog Creek (Cretaceous of the United States)

Where: Chouteau County, Montana (47.7° N, 109.6° W: paleocoordinates 54.8° N, 75.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: McClelland Ferry Member (Judith River Formation), Middle Campanian (83.5 - 70.6 Ma)

• second bed of lignite above lower sandstone bed; probably McLelland Ferry Mbr.

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lignite and sandstone

• "second bed of lignite above the lower bed of sandstone"

Size classes: macrofossils, mesofossils

Collected by E. D. Cope in 1876; reposited in the AMNH

Collection methods: quarrying, surface (in situ), mechanical,

Primary reference: E. D. Cope. 1876. Descriptions of some vertebrate remains from the Fort Union Beds of Montana. Proceedings of the Academy of Natural Sciences of Philadelphia 28:248-261 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 46121: authorized by Matthew Carrano, entered by Matthew Carrano on 04.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Neornithischia - Ceratopsidae
Monoclonius crassus n. gen. n. sp. Cope 1876 ceratopsid
AMNH 3998, 3997
Monoclonius recurvicornis n. sp.2 Cope 1889 ceratopsid
AMNH 3999
 Neornithischia - Hadrosauridae
Diclonius sp.1 Cope 1876 hadrosaurid
"either the species D. calamarius or D. perangulatus, or one not described."