Aigialosaurus, Gorjanovic-Kramberger, 1892

Conrad, J. L., 2008, Phylogeny And Systematics Of Squamata (Reptilia) Based On Morphology, Bulletin of the American Museum of Natural History 2008 (310), pp. 1-182 : 126

Aigialosaurus + Carsosaurus marchesetti + Eidolosaurus trauthi + Mosasauridae

(fig. 55F)

DIAGNOSIS: The clade containing mosasauroids exclusive of Adriosaurus , Opetiosaurus , and Pontosaurus is diagnosed, in this analysis, by 13(1) premaxilla possessing an external contact with the frontal and 46(1) jugal extending well anterior to the level of the orbit.

COMMENTS: The current analysis offers only very weak support for an aigialosaurid clade. Instead, ‘‘aigialosaurs’’ are a paraphyletic assemblage that is intermediate between dolichosaurids and mosasaurids. Some of the principle trees in this analysis support close relationships between Carsosaurus marchesetti and Opetiosaurus , between Carsosaurus marchesetti and Aigialosaurus , or between Aigialosaurus , Carsosaurus marchesetti , and Opetiosaurus . However, these relationships are not supported in the strict or Adams consensus trees (see comments below).