Procuhy

Both specimens of P. nazariensis are relatively fragmentary, and the taxon is diagnosed only by a unique combination of characters rather than by any autapomorphies. Per Marsicano et al., this combination is: anteriormost extension of the squamosal posterior to parietal midlength; combined width of both parietals equal to interorbital width; pineal foramen positioned posterior to the midlength of the parietal; supratemporal exposed on the posterior border of the skull table; length of the parietal more than three times its width; in the mandible, presence of postglenoid process of the surangular separated from the retroarticular process of the articular by the mandibular sulcus.

Below are the phylogenetic results of Marsicano et al. (2021):

Both these results and those of the original description by Cisneros et al. (2015) show that Procuhy is more closely related to the North American Trimerorhachis than to the other dvinosaur from the Pedra de Fogo Formation, Timonya, although both are more closely related to North American taxa than to younger taxa from the southern hemisphere like the Early Triassic Thabanchuia from South Africa. A close connection to the North American taxa is also corroborated by the occurrence of the captorhinid Captorhinikos in the Pedra de Fogo Formation.^[3]