2 miles southeast of U-L Ranch, Buck Creek (Cretaceous of the United States)

Also known as T. obtusus type, Lance Creek

Where: Niobrara County, Wyoming (43.2° N, 104.6° W: paleocoordinates 49.8° N, 78.9° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Lance Formation, Maastrichtian (72.1 - 66.0 Ma)

• "about the middle of the Laramie"

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by J. B. Hatcher in 1890; reposited in the USNM, YPM

Collection methods: quarrying, mechanical,

Primary reference: J. B. Hatcher, O. C. Marsh, and R. S. Lull. 1907. The Ceratopsia. Monographs of the United States Geological Survey 49:1-198 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 46131: authorized by Matthew Carrano, entered by Matthew Carrano on 04.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

 Neornithischia - Ceratopsidae
"Triceratops obtusus n. sp." = Triceratops horridus
"Triceratops obtusus n. sp." = Triceratops horridus Marsh 1889 ceratopsid
USNM 4720 (= Sk. 9)