Polesinesuchus

Polesinesuchus is an extinct genus of stagonolepidid aetosaur known from the Late Triassic of southern Brazil. Fossils have been found from the Santa Maria Supersequence of the late Carnian and early Norian stages, making Polesinesuchus one of the oldest aetosaurs. It contains a single species, Polesinesuchus aurelioi, the fifth aetosaur species known from South America to date. Anatomical evidence suggests that Polesinesuchus likely represents a juvenile individual of the contemporary Aetosauroides.

== Discovery == Polesinesuchus was first named by Lúcio Roberto-da-Silva, Julia B. Desojo, Sérgio F. Cabreira, Alex S. S. Aires, Rodrigo T. Müller, Cristian P. Pacheco and Sérgio Dias-da-Silva in 2014 and the type species is Polesinesuchus aurelioi. It is known solely from its holotype specimen, a partially articulated partial skeleton. It is composed of the parietal bone and the braincase as well as postcranial elements including cervical, dorsal, sacral and caudal vertebrae, both scapulae, a humerus, the ilium, pubis, ischium and tibia, a partial right pes, and anterior and mid-dorsal paramedian osteoderms. It was collected from the Santa Maria Formation which dates back to the late Carnian and earliest Norian stages of the Late Triassic.