Aetosaurinae

Aetosaurinae is one of the two main clades of aetosaurs, the other being Desmatosuchia. It is a stem-based taxon defined as all aetosaurs more closely related to Aetosaurus than Desmatosuchus. Aetosaurinae currently comprises Aetosaurus, similar forms such as Coahomasuchus and Stenomyti, and the widespread and successful aetosaur clade Typothoracinae.

== Previous usage == Aetosaurinae was originally named in 2000, as a subfamily solely including Aetosaurus, which was assumed to be the earliest-diverging aetosaur. In 2007, it was extended to include the subfamily Typothoracinae as well as various basal aetosaurs which were not clearly within Desmatosuchinae. These proposed non-typothoracine aetosaurines included Coahomasuchus, Neoaetosauroides, Aetosauroides, Stagonolepis robertsoni, and "Stagonolepis" (Calyptosuchus) wellesi. As a subfamily containing practically all non-desmatosuchine aetosaurs, Aetosaurinae was poorly supported. It was diagnosed by a singly synapomorphy: the dorsal eminence of each paramedian osteoderm was offset medially.