List of marginocephalian type specimens

This list of marginocephalian type specimens is a list of fossils serving as the official standard-bearers for inclusion in the species and genera of the dinosaur clade Marginocephalia, which includes the thick-headed pachycephalosaurs and the horned ceratopsians. Type specimens are those which are definitionally members of biological taxa and additional specimens can only be "referred" to these taxa if an expert deems them sufficiently similar to the type.

The list
Species Genus Nickname Catalogue Number Institution Age Unit Country Notes Images

Pachycephalosaurus reinheimeri

N/A

N/A

DMNH 469

Denver Museum of Natural History

Lance Formation

United States
Holotype of Pachycephalosaurus reinheimeri.

Pachycephalosaurus wyomingensis

Pachycephalosaurus

N/A

USNM 12031

United States National Museum

United States
Holotype of Pachycephalosaurus wyomingensis.

Triceratops horridus

Triceratops

N/A

YPM 1820

Yale Peabody Museum

Maastricthian

Lance Formation

United States
YPM 1820, the holotype of Triceratops horridus.

Triceratops obtusus

N/A

Hatcher

USNM 4720

United States National Museum

United States
USNM 4720, the holotype of Triceratops obtusus.
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