Where: Adams County, Colorado (40.3° N, 106.9° W: paleocoordinates 47.3° N, 83.0° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Laramie Formation, Late/Upper Maastrichtian (70.6 - 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 | |
Polyonax mortuarius n. gen. n. sp.
Polyonax mortuarius n. gen. n. sp. Cope 1874 ceratopsid | |
Cionodon arctatus n. gen. n. sp., "Agathaumas milo n. sp." = Edmontosaurus regalis
Cionodon arctatus n. gen. n. sp. Cope 1874 hadrosaurid
"Agathaumas milo n. sp." = Edmontosaurus regalis Lambe 1917 hadrosaurine | |
|
? 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)
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
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