Between North and Middle forks Alkali Creek, SW Edgemont (Cretaceous of the United States)

Where: Fall River County, South Dakota (43.5° N, 104.0° W: paleocoordinates 49.4° N, 71.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pierre Shale Formation, Campanian (83.6 - 72.1 Ma)

• lower Pierre

• bed-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Collected by B. Brown; reposited in the AMNH

Primary reference: D. A. Russell. 1967. Systematics and morphology of American mosasaurs (Reptilia, Sauria). Bulletin of the Peabody Museum of Natural History 23:1-252 [M. Carrano/H. Street/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 109761: authorized by Matthew Carrano, entered by Hallie Street on 26.05.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Squamata - Mosasauridae
"Platecarpus ictericus" = Platecarpus tympaniticus
"Platecarpus ictericus" = Platecarpus tympaniticus Cope 1869 mosasaur
AMNH 5811