Where: Sioux County, North Dakota (46.1° N, 100.6° W: paleocoordinates 51.6° N, 73.9° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Hell Creek Formation (Montana Group), Late/Upper Maastrichtian (70.6 - 66.0 Ma)
• Plesiosaur vertebrate and ammonite might be from th Pierre Shale Formation
• bed-level stratigraphic resolution
Environment/lithology: terrestrial; lithology not reported
Size class: macrofossils
Collected by E. D. Cope in 1893; reposited in the ANSP
Primary reference: E. Daeschler and A. R. Fiorillo. 1989. Rediscovery of fossil material at the Academy of Natural Sciences of Philadelphia from Edward Drinker Cope's 1893 expedition to the Dakotas. The Mosasaur 4:143-148 [M. Carrano/K. Maguire/M. Carrano]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 57919: authorized by Matthew Carrano, entered by Kaitlin Maguire on 06.01.2006, edited by John Alroy
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
"Scaphites cf. nicolletii" = Hoploscaphites nicolletii, Scaphites sp.
"Scaphites cf. nicolletii" = Hoploscaphites nicolletii Morton 1842 ammonite
Scaphites sp. Parkinson 1811 ammonite | |
Reptilia | |
Baenidae indet. Cope 1882 turtle | |
Trionychinae indet. Gray 1825 softshell turtle | |
Crocodylidae indet. crocodile | |
cf. Triceratops sp. Marsh 1889 ceratopsid | |
cf. Edmontosaurus sp. Lambe 1917 hadrosaurine | |
Ornithomimidae indet. Marsh 1890 ornithomimid | |
Champsosaurus sp. Cope 1876 choristodere | |
Plesiosauria indet. de Blainville 1835 plesiosaur |