Oh belt up.

I feel like it was unecessary to ping him, but the evidence supporting Pachycephalosaurus and Stygimoloch being in the same genus is pretty strong imo. There are direct intermediates between the two (particulaly the specimen nicknamed "Sandy"), and considering they seem to come from different stratigraphic levels ...

Bruh. I really hate this place.

... do you even know what an anagenetic lineage is? I'm saying that they were distinct, but that Stygimoloch is probably an invalid name. Not like that matters, though, since we still call bonobos "bonobos" despite that not being their genus name any more.

Acro

Acro as in Acrotholus?

'tis sadly the only Acro- pachycephalosaurid.

^^Yes

Reject pachy, embrace Stegoceras

Pachycephalosaurus is in the game!