Stratum.black
Pachycephalosaurus wyomingensis — Pachycephalosaurus wyomingensis
Pachycephalosaurus wyomingensis — Fred Wierum, Wikimedia Commons, CC BY 4.0

Dinosaur

Pachycephalosaurus wyomingensis

Dome-headed dinosaur

Pachycephalosaurus is the thick-skulled dinosaur of the Hell Creek and Lance formations, known mostly from its solid dome and the horned skull ornaments. Dome fragments and complete domes are the collectible parts; postcrania are rare. Small leaf-shaped teeth are sometimes offered but are hard to distinguish from other ornithischians.

PhylumChordata
ClassReptilia
OrderOrnithischia
FamilyPachycephalosauridae
GroupDinosaur
Rank (PBDB)genus· Paleobiology Database
AuthorBrown and Schlaikjer 1943· Paleobiology Database
Classification (PBDB)Chordata › Ornithischia › NO_ORDER_SPECIFIED › NO_FAMILY_SPECIFIED· Paleobiology Database
Range (PBDB)83.6–66 Ma· Paleobiology Database
PBDB occurrences34· Paleobiology Database

Photographs

Pachycephalosaurus wyomingensis — Pachycephalosaurus wyomingensis Gilmore, 1931
Pachycephalosaurus wyomingensis Gilmore, 1931 — Smithsonian Institution (NMNHPALEO), Smithsonian Open Access, CC0

Age

Formations

Elsewhere

Cite this article

Stratum Study. "Pachycephalosaurus wyomingensis" (Taxon). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/taxa/pachycephalosaurus-wyomingensis. Accessed 2026-09-20.

BibTeX · CSL-JSON

@misc{stratum-pachycephalosaurus-wyomingensis,
  title        = {Pachycephalosaurus wyomingensis},
  author       = {{Stratum Study}},
  howpublished = {\url{https://stratum.black/study/taxa/pachycephalosaurus-wyomingensis}},
  year         = {2026},
  note         = {Taxon article, Stratum Study pack 2026.09, as of 2026-09-19; sources: stratum, pbdb, wikidata, commons, smithsonian. Accessed 2026-09-20.}
}

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