near head of Rock Creek (Cretaceous of the United States)

Also known as AMNH 5031

Where: McCone County, Montana (47.7° N, 106.0° W: paleocoordinates 54.4° N, 78.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Hell Creek Formation, Maastrichtian (72.1 - 66.0 Ma)

• 80 ft below Fort Union Fm.

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; claystone

Size class: macrofossils

Collected by B. Brown & Kaisen in 1909; reposited in the AMNH

Collection methods: quarrying,

Primary reference: H. F. Osborn. 1910. Department of Vertebrate Palaeontology. Forty-First Annual Report of the American Museum of Natural History for the Year 1909 71-72 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 54081: authorized by Matthew Carrano, entered by Matthew Carrano on 22.09.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Neornithischia - Thescelosauridae
Thescelosaurus neglectus Gilmore 1913 ornithischian
"a small undescribed dinosaur"