[N] 2006 A virtually complete skull of Camptosaurus dispar
Scheetz, R., Weishampel, D., Britt, B., Cloward, K. & Miles, C. (2006) Finally, a virtually complete skull of Camptosaurus dispar. JVP 26(3) Abstracts pp.120
A partially articulated skeleton of Camptosaurus dispar was recently recovered from the Morrison Formation of Bone Cabin West Quarry, Wyoming. The juvenile specimen (femur length = 460 mm, 60% of largest known specimen) is important because it includes the first virtually complete skull of Camptosaurus—a skull that differs substantially from previous reconstructions. Marsh’s long, rectangular skull restoration featured on most Camptosaurus mounts was largely based on a more derived iguanodont skull, referred to C. amplus, collected near Colorado Springs, Colorado in 1886. The new C. dispar skull shows the skull is triangular in lateral and dorsal aspects, with a wide occiput and a short, pointed snout. C. dispar differs from “C. amplus” in having a much larger lacrimal that extends along the top of the maxilla, a jugal that lacks a ventrally deflected flange, a short ventral process of the squamosal, a shorter quadrate, and less derived posterior mandible. Although juvenile, this specimen reveals cranial elements that differ significantly from the “C. amplus” skull in features that do not reflect ontogenetic status, allying itself more closely to Dryosaurus than to Iguanodon.