Aetosauriformes

Extinct clade of reptiles

Aetosauriforms
Temporal range: Late Triassic, 237–201.3 Ma
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Life restoration and size diagram of Desmatosuchus spurensis, an aetosaur.
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Archosauria
Clade: Pseudosuchia
Clade: Suchia
Clade: Aetosauriformes
Parker et al., 2021
Subgroups

Aetosauriformes is an extinct clade of early-diverging pseudosuchians (the group of archosaurs that contains modern crocodylians and their stem group relatives). It includes the aetosaurs, a group of heavily armoured and at least partially herbivorous pseudosuchians, as well as the closely related genera Acaenasuchus, Euscolosuchus and Revueltosaurus.[1]

Classification

Aetosauriformes was named in 2021 by William G. Parker and colleagues, as part of a redescription of the species Revueltosaurus callenderi. It is a stem-based taxon, defined as the most inclusive clade that contains Acaenasuchus geoffreyi, Aetosaurus ferratus, Desmatosuchus spurensis and Revueltosaurus callenderi, but not Erpetosuchus granti, Ornithosuchus woodwardi, Poposaurus gracilis, Postosuchus kirkpatricki, Rutiodon carolinensis, Crocodylus niloticus (the Nile crocodile) or Passer domesticus (the house sparrow).[1]

Parker and colleagues performed a phylogenetic analysis using a modified version of the data matrix of Nesbitt et al. (2011). Aetosauriformes was recovered as the sister group of the family Erpetosuchidae, with the two groups forming the earliest-diverging clade within Suchia. A simplified cladogram from that study is shown below:[1]


References

  1. ^ a b c Parker, W. G.; Nesbitt, S. J.; Irmis, R. B.; Martz, J. W.; Marsh, A. D.; Brown, M. A.; Stocker, M. R.; Werning, S. (2021). "Osteology and relationships of Revueltosaurus callenderi (Archosauria: Suchia) from the Upper Triassic (Norian) Chinle Formation of Petrified Forest National Park, Arizona, United States". The Anatomical Record. 305 (10): 2353–2414. doi:10.1002/ar.24757. PMC 9544919. PMID 34585850.
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Sauropsida
    • see Sauropsida
Archosauromorpha
    • see Archosauromorpha
Pseudosuchia
    • see below↓
Ornithosuchidae
Erpetosuchidae
Aetosauriformes
Aetosauria
    • see Aetosauria
Gracilisuchidae
Paracrocodylomorpha
    • see below↓
Ornithosuchus longidens

Erpetosuchus granti

Gracilisuchus stepanicicorum
Poposauroidea
Ctenosauriscidae
Poposauridae
Shuvosauridae
Loricata
Rauisuchidae
Crocodylomorpha
    • see below↓
Arizonasaurus babbitti

Effigia okeeffeae Saurosuchus galilei

Postosuchus kirkpatricki
Saltoposuchidae
Hallopodidae
Thalattosuchia
    • see Thalattosuchia
Protosuchidae
Notochampsidae
Gobiosuchidae
Shartegosuchoidea
Shartegosuchidae
Metasuchia
Ziphosuchia
Neosuchia
Hesperosuchus agilis

Hoplosuchus kayi

Sichuanosuchus huidongensis


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