Suchia

Suchians Temporal range: Early Triassic - Recent, 249.7–0 Ma PreЄ Є O S D C P T J K Pg N
Prestosuchus chiniquensis, an early suchian
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Pseudosuchia
Clade:	Suchia Krebs, 1974
Subgroups
†Gracilisuchidae †Revueltosaurus †Aetosauria †Ticinosuchus Paracrocodylomorpha

Suchia is a clade of archosaurs that includes all pseudosuchians except for the ornithosuchids. It includes crocodilians and their extinct relatives. It was defined as the least inclusive clade containing Aetosaurus ferratus, Rauisuchus tiradentes, Prestosuchus chiniquensis, Gracilisuchus stipanicicorum, and Crocodylus niloticus (the living Nile crocodile) by Nesbitt (2011).

Classification

It was originally defined by Krebs in 1974. Paul Sereno provided a different definition, which included Gracilisuchus stipanicicorum, Aetosauria, Rauisuchia, Poposauridae, Crocodylomorpha, and all descendants of their common ancestor. Nesbitt (2011) redefined it as the least inclusive clade containing Aetosaurus ferratus, Rauisuchus tiradentes, Prestosuchus chiniquensis, and Crocodylus niloticus (the living Nile crocodile). Suchia, therefore, is a node-based taxon. It includes crocodylomorphs and more basal Triassic forms like aetosaurs and rauisuchians.^[1] Butler et al. (2011) found that Suchia includes Gracilisuchus, Turfanosuchus, Revueltosaurus, Aetosauria, Ticinosuchus, and paracrocodylomorphs.^[2]

Phylogeny

Below is the cladogram originally identified by Krebs (1974) in his definition of Suchia:^[1]

Below is a phylogenetic cladogram by Butler et al. in 2011 showing the cladistics of Archosauriformes, focusing mostly on Pseudosuchia:^[2] Clade names follow Nesbitt 2011.^[1]

References

1. 1 2 3 Nesbitt, S.J. (2011). "The Early Evolution of Archosaurs: Relationships and the Origin of Major Clades". Bulletin of the American Museum of Natural History 352: 189. doi:10.1206/352.1. ISSN 0003-0090. 
2. 1 2 Butler, R.J.; Brusatte, S.J.; Reich, M.; Nesbitt, S.J.; Schoch, R.R.; Hornung, J.J. (2011). Andrew A. Farke, ed. "The Sail-Backed Reptile Ctenosauriscus from the Latest Early Triassic of Germany and the Timing and Biogeography of the Early Archosaur Radiation". PLoS ONE 6 (10): e25693. doi:10.1371/journal.pone.0025693. PMC 3194824. PMID 22022431. 

External links

• Suchia in the Paleobiology Database

Basal crurotarsans Kingdom: Animalia Phylum: Chordata Class: Sauropsida Infraclass: Archosauromorpha   Major clades Phytosauria Avemetatarsalia Pseudosuchia Suchia Aetosauria "Rauisuchia" Rauisuchoidea Poposauroidea Loricata Paracrocodylomorpha Bathyotica   Phytosauria Basal phytosaurs Arganarhinus Ebrachosuchus Mesorhinosuchus Paleorhinus Parasuchus Promystriosuchus Wannia Phytosauridae Angistorhinus Brachysuchus Protome Rutiodon Leptosuchomorpha Leptosuchus Pravusuchus Smilosuchus Pseudopalatinae Coburgosuchus Machaeroprosopus Mystriosuchus Nicrosaurus Redondasaurus Nomina dubia Angistorhinopsis Belodon Centemodon Clepsysaurus Compsosaurus Eurydorus Francosuchus Heterodontosuchus Omosaurus Palaeoctonus "Palaeosaurus" Phytosaurus Rileyasuchus Suchoprion Termatosaurus   Avemetatarsalia Scleromochlidae Scleromochlus Ornithodira Pterosauromorpha Pterosauria Dinosauromorpha Lagerpetonidae Dromomeron Lagerpeton Dinosauriformes Dinosauria Silesauridae Asilisaurus Diodorus Eucoelophysis Ignotosaurus Lewisuchus Lutungutali Pseudolagosuchus Sacisaurus Silesaurus Technosaurus Others Marasuchus Nyasasaurus Saltopus Teyuwasu   Pseudosuchia Ornithosuchidae Ornithosuchus Riojasuchus Venaticosuchus Suchia Erpetosuchidae ?Dyoplax Erpetosuchus Parringtonia Gracilisuchidae Gracilisuchus Turfanosuchus Yonghesuchus Others Euscolosuchus Koilamasuchus Nundasuchus Revueltosaurus Ticinosuchus Aetosauria Paracrocodylomorpha   Aetosauria Basal aetosaurs Aetosauroides Stagonolepididae Acompsosaurus Adamanasuchus Aetobarbakinoides Aetosaurus Calyptosuchus Coahomasuchus Neoaetosauroides Polesinesuchus Stagonolepis Stenomyti Desmatosuchinae Acaenasuchus Desmatosuchus Gorgetosuchus Longosuchus Lucasuchus Sierritasuchus Typothoracisinae ?Chilenosuchus Typothorax Redondasuchus Paratypothoracisini Heliocanthus Paratypothorax Tecovasuchus   Paracrocodylomorpha / "Rauisuchia" Poposauroidea Diandongosuchus Qianosuchus Yarasuchus Ctenosauriscidae Arizonasaurus Bromsgroveia Bystrowisuchus Ctenosauriscus Hypselorhachis Xilousuchus Lotosauridae Lotosaurus Poposauridae Dolichobrachium Poposaurus Shuvosauridae Effigia Shuvosaurus Sillosuchus Loricata / "Rauisuchoidea" Apatosuchus ?Arganasuchus Batrachotomus Dagasuchus Decuriasuchus Fasolasuchus Heptasuchus Karamuru Luperosuchus ?"Mandasuchus" ?"Pallisteria" Prestosuchus Procerosuchus Saurosuchus ?Stagonosuchus Rauisuchidae Polonosuchus Postosuchus Rauisuchus Teratosaurus Tikisuchus Crocodylomorpha Others Vytshegdosuchus   Related categories Archosaurs Crurotarsans Ornithodirans