Aetosaurinae
| Aetosaurinae Temporal range: Late Triassic | |
|---|---|
 | |
| Stagonolepis | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | †Aetosauria |
| Family: | †Stagonolepididae |
| Subfamily: | †Aetosaurinae Heckert and Lucas, 2000 |
| Clades | |
Aetosaurinae is one of the two subfamilies of aetosaurs, the other being Desmatosuchinae. It is a stem-based taxon defined as all aetosaurs more closely related to Aetosaurus than to the last common ancestor of Aetosaurus and Desmatosuchus.[1] The only synapomorphy that diagnoses the clade Aetosaurinae is the medial offset of the dorsal eminences of the paramedian osteoderms.[2] A phylogenetic study in 2012 found Aetosaurinae to be paraphyletic, with Aetosaurus being the basal-most stagonolepidid and aetosaurines like Calyptosuchus, Neoaetosauroides, and the newly described Aetobarbakinoides being successively more derived taxa leading up to a clade containing Desmatosuchinae and Typothoracisinae. Under this phylogeny, most traditional aetosaurines are more closely related to Desmatosuchus than they are to Aetosaurus, and the clade Aetosaurinae can only include Aetosaurus.[3]
References
- ↑ Heckert, A. B.; and Lucas; S. G. (2000). "Taxonomy, phylogeny, biostratigraphy, biochronology, paleobiogeography, and evolution of the Late Triassic Aetosauria (Archosauria: Crurotarsi).". Zentralblatt für Geologie und Paläontologie, Teil I, Heft. 11-12: 1539–1587.
- ↑ Parker, W. G. (2007). "Reassessment of the aetosaur ‘Desmatosuchus’ chamaensis with a reanalysis of the phylogeny of the Aetosauria (Archosauria:Pseudosuchia)". Journal of Systematic Palaeontology 5: 41–68. doi:10.1017/S1477201906001994.
- ↑ Desojo, J.B.; Ezcurra, M.D.; Kischlat, E.E. (2012). "A new aetosaur genus (Archosauria: Pseudosuchia) from the early Late Triassic of southern Brazil" (PDF). Zootaxa 3166: 1–33. ISSN 1175-5326.