Niemi Ranch (Cretaceous of the United States)

Where: Harding County, South Dakota (45.7° N, 103.6° W: paleocoordinates 51.9° N, 77.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Hell Creek Formation (Montana Group), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• approx. 20 m below K/T boundary

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; gray mudstone

• "a dark grey overbank mudstone"

Size class: macrofossils

Collected by S. Sacrison & S. Sacrison in 1997

Collection methods: surface (float), surface (in situ),

Primary reference: C. J. Ott and P. L. Larson. 2010. A new, small ceratopsian dinosaur from the latest Cretaceous Hell Creek Formation, northwest South Dakota, United States: a preliminary description. In M. J. Ryan, B. J. Chinnery-Allgeier, D. A. Eberth (eds.), New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium. Indiana University Press, Bloomington 203-218 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 97798: authorized by Matthew Carrano, entered by Matthew Carrano on 30.08.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Ornithischia - Ceratopsidae
Tatankaceratops sacrisonorum n. gen. n. sp. Ott and Larson 2010 ceratopsid
BHI-6266