Extreme cranial ontogeny in the upper cretaceous dinosaur pachycephalosaurus.

by John R Horner, Mark B Goodwin
Published 2009-10-01

Dinosaur census reveals abundant Tyrannosaurus and rare ontogenetic stages in the Upper Cretaceous Hell Creek Formation (Maastrichtian), Montana, USA.

by John R Horner, Mark B Goodwin, Nathan Myhrvold
Published 2011-02-01

Cranial ontogeny in Stegoceras validum (Dinosauria: Pachycephalosauria): a quantitative model of pachycephalosaur dome growth and variation.

by Ryan K Schott, David C Evans, Mark B Goodwin, John R Horner, Caleb Marshall Brown, Nicholas R Longrich
Published 2011-01-01