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Pachycephalosaurus wyomingensis Gilmore 1931 (ornithischian)

Reptilia - Neornithischia - Pachycephalosauridae

PaleoDB taxon number: 52835

Alternative combination: Troodon wyomingensis

Synonyms: Dracorex hogwartsi Bakker et al. 2006 (no. 164058), Dracorex hogwartsia Bakker et al. 2006 (no. 90169), Pachycephalosaurus grangeri Brown and Schlaikjer 1943 (no. 64666), Pachycephalosaurus reinheimeri Brown and Schlaikjer 1943 (no. 64667), Stenotholus kohleri Giffin et al. 1988 (no. 53215), Stenotholus kohlerorum Giffin et al. 1988 (no. 145188), Stygimoloch spinifer Galton and Sues 1983 (no. 56577), Tylosteus ornatus Leidy 1872 (no. 56580)

Belongs to Pachycephalosaurus according to R. M. Sullivan 2006

Sister taxa: none

Type specimens:

  • Pachycephalosaurus wyomingensis: USNM 12031. Its type locality is 9 miles southwest of Warren Post Office, which is in a Maastrichtian terrestrial horizon in the Lance Formation of Wyoming.
  • Dracorex hogwartsia: TCMI 2004.17.1, a partial skeleton. Its type locality is Dracorex type site, which is in a Maastrichtian terrestrial horizon in the Hell Creek Formation of South Dakota.
  • Pachycephalosaurus grangeri: AMNH 1696, a skull. Its type locality is William Winkley Ranch, Powder Hill, which is in a Maastrichtian terrestrial horizon in the Hell Creek Formation of Montana.
  • Pachycephalosaurus reinheimeri: DMNH 469, a skull. Its type locality is Twito ranch (DMNH), which is in a Maastrichtian terrestrial horizon in the Lance Formation of South Dakota.
  • Stenotholus kohleri: UCMP 110433. Its type locality is MPM locality 3850 (Hell Creek Formation), which is in a Maastrichtian channel sandstone/siltstone in the Hell Creek Formation of Montana.
  • Stygimoloch spinifer: UCMP 110433, a skull. Its type locality is Harbicht Hill South No. 2, UCMP V-73100, which is in a Maastrichtian terrestrial horizon in the Hell Creek Formation of Montana.
  • Tylosteus ornatus: ANSP 8568, a partial skull.

Ecology: ground dwelling herbivore