DinoDex

Holotype

YPM 1820

Triceratops horridus

Open the Triceratops horridus profile

Facts

Catalog number
YPM 1820
Institution
Yale Peabody Museum (YPM)
Year found
1888
Found by
John Bell Hatcher
Locality
Lance Formation outcrops, Niobrara County, Wyoming
Formation
Lance Formation

Images

The Triceratops horridus type skull YPM 1820, as figured in The Ceratopsia (Hatcher, Marsh & Lull 1907).Image credit: J. B. Hatcher, O. C. Marsh and R. S. Lull, Public domain, via Wikimedia CommonsPublic domainSource (opens in a new tab)

What this specimen preserves

Holotype: YPM 1820

  • Preserved
  • Partial
  • Reconstructed
  • Unknown / not recorded
Region by region (table)
Skeleton regions of Holotype: YPM 1820
RegionState
SkullPartial · Horn cores and partial skull.
MandibleUnknown / not recorded
TeethUnknown / not recorded
Cervical vertebraeUnknown / not recorded
Dorsal vertebraeUnknown / not recorded
SacrumUnknown / not recorded
Caudal vertebraeUnknown / not recorded
RibsUnknown / not recorded
GastraliaUnknown / not recorded
Scapula / shoulder girdleUnknown / not recorded
HumerusUnknown / not recorded
Forearm (radius / ulna)Unknown / not recorded
Hand (manus)Unknown / not recorded
PelvisUnknown / not recorded
FemurUnknown / not recorded
Tibia / fibulaUnknown / not recorded
Foot (pes)Unknown / not recorded

Excavation history

A partial skull collected by John Bell Hatcher for O. C. Marsh; first named Ceratops horridus (1889) and moved to the new genus Triceratops the same year.

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