Bijou Creek (USG&GS) (Cretaceous of the United States)

Where: Adams County, Colorado (40.3° N, 106.9° W: paleocoordinates 47.4° N, 82.5° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Laramie Formation, Maastrichtian (72.1 - 66.0 Ma)

• also listed as Arapahoe Fm. and "Bitter Creek Coal Series"

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by E. D. Cope in 1873; reposited in the AMNH

Collection methods: surface (float),

• collection made by one of Cope's assistants

Primary reference: E. D. Cope. 1874. Report on the stratigraphy and Pliocene vertebrate paleontology of northern Colorado. Bulletin of the United States Geological and Geographical Survey of the Territories 1(1):9-22 [J. Marcot/J. Marcot/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 49524: authorized by Matthew Carrano, entered by Matthew Carrano on 19.04.2005, edited by Roger Benson

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines - Pantrionychidae
Trionyx vagans n. sp. Cope 1874 turtle
- from same locality as the holotype of Plastomenus punctulatus
? Plastomenus insignis n. sp. Cope 1874 turtle
AMNH 1846, holotype fragment of hyoplastron - from same locality as the holotype of Plastomenus punctulatus
? Plastomenus punctulatus n. sp. Cope 1874 turtle
AMNH 1845, holotype costal plate fragment ('in deposits believed by Whitman Cross to belong to the Arapahoe formation'; however, the locality, collector and date match the current locality)
 Neornithischia - Ceratopsidae
Polyonax mortuarius n. gen. n. sp.
Polyonax mortuarius n. gen. n. sp. Cope 1874 ceratopsid
 Neornithischia - Hadrosauridae
"Agathaumas milo n. sp." = Edmontosaurus regalis, Cionodon arctatus n. gen. n. sp.
"Agathaumas milo n. sp." = Edmontosaurus regalis Lambe 1917 hadrosaurine
Cionodon arctatus n. gen. n. sp. Cope 1874 hadrosaurid