Morphology of the Late Cretaceous Crocodylomorph Shamosuchus djadochtaensis and a Discussion of Neosuchian Phylogeny as Related to the Origin of Eusuchia

摘要: Abstract We describe a new specimen of the fossil crocodyliform taxon Shamosuchus djadochtaensis from Late Cretaceous Djadokhta Formation. The consists an almost complete skull found in association with postcranial material. Because it is considerably more than holotype, permits proper diagnosis and offers information for exploring its phylogenetic relationships. analysis conducted here improves sampling neosuchian crocodyliforms respect to previous approaches systematics reveals that bears important toward understanding relationships advanced neosuchians evolutionary origin Eusuchia. be sister group Rugosuchus nonganensis, comprising Asian clade diagnosed by presence sagittal ridge on dorsal surface frontal, confluent openings exit o...