Predicated on our data, Roentgen
The original three character says strengthen the articulations involving the face facets regarding the chin musculature (Schumacher, 1973 ). The spot of your abducens bravery foramen was to begin with hypothesized as a possible synapomorphy help an effective crocodylomorph + aetosaur clade personal out of other pseudosuchians (Gower, 2002 ), but newer phylogenetic analyses, along with ours, highly recommend which apomorphy developed at least twice-after inside aetosauriforms as soon as into the crocodylomorphs. Although not quantified in this data, a good dorsoventrally thickened skull rooftop (i.elizabeth., nasals, frontals, and parietals) is additionally mutual of the Roentgen. callenderi, erpetosuchids, and aetosaurs.
callenderi and aetosaurs share parallels from the dimensions of the new hindlimb to forelimb and you can shape of the humerus and proximal ankle points, in the event those individuals similarities were not unambiguous synapomorphies. Particularly, Roentgen. callenderi and you will aetosaurs express a reduced distance according to the fresh humerus, and you may an excellent concave rear skin of your own calcaneal tuber, though these apomorphies possess a far more prevalent shipping among Archosauria. Roentgen. callenderi and you can aetosaurs express middle trunk backbone having diapophyses and you can parapophyses that expand laterally where one another articulations originate on the good transverse processes. [Read more…]