east of Lance Creek (Cretaceous of the United States)

Also known as T. calicornis type

Where: Niobrara County, Wyoming (43.1° N, 104.7° W: paleocoordinates 49.8° N, 79.0° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by J. B. Hatcher in 1891; reposited in the USNM

Collection methods: quarrying, mechanical,

Primary reference: R. S. Lull. 1915. The mammals and horned dinosaurs of the Lance Formation of Niobrara County, Wyoming. The American Journal of Science, series 4 40(238):319-348 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 50931: authorized by Matthew Carrano, entered by Matthew Carrano on 24.05.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Neornithischia - Ceratopsidae
"Triceratops calicornis n. sp." = Triceratops horridus
"Triceratops calicornis n. sp." = Triceratops horridus Marsh 1889 ceratopsid
USNM 4928 (= Sk. 9)