Species
Extinct

Tylosteus ornatus

subjective synonym of Pachycephalosaurus wyomingensis
Leidy 1872
This taxon is considered subjective synonym of of the valid taxon Pachycephalosaurus wyomingensis according to the Paleobiology Database. See the page for Pachycephalosaurus wyomingensis →
Bibliography
Original description
J. Leidy. 1872. Remarks on some extinct vertebrates. Proceedings of the Academy of Natural Sciences of Philadelphia 24(1):38-40