DescriptionStratigraphic positions of chasmosaurine taxa.png Stratigraphic positions of chasmosaurine taxa. Morphospecies of Chasmosaurus (A–D) and Pentaceratops...
of Holmes et al. (2001; A, B) and Sampson et al. (2010, C) are reconfigured (G-I) based on comparison to stratigraphically preceding chasmosaurines c...