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]
| Aetosauriforms Temporal range: Late Triassic,
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| Life restoration and size diagram of Desmatosuchus spurensis, an aetosaur. | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Archosauria |
| Clade: | Pseudosuchia |
| Clade: | Suchia |
| Clade: | †Aetosauriformes Parker et al., 2021 |
| Subgroups | |
Classification
editAetosauriformes 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]
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References
edit- ^ 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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