Complex sentence: Horner saw some pachycephalosaur skulls as indicative for a taxon in between "Stegoceras" and "Pachycephalosaurus"; these have not been consistently referred to a new genus.
Split into simpler sentences: Horner saw some pachycephalosaur skulls as indicative for a taxon in between "Stegoceras" and "Pachycephalosaurus". These have not been consistently referred to a new genus.