Suchia

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Suchians
Temporal range: Early Triassic - Recent, 249.7–0 Ma
Prestosuchus.jpg
Prestosuchus chiniquensis, an early suchian
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Pseudosuchia
Clade: Suchia
Krebs, 1974
Subgroups

Suchia is a clade of archosaurs containing the majority of pseudosuchians. 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). Generally the only pseudosuchians which are excluded from the group are the ornithosuchids, although at least one analysis classifies ornithosuchids as close relatives of erpetosuchids (which are usually considered suchians) and aetosaurs (which are suchians by definition of the group).[1]

Classification[edit]

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.[2] Butler et al. (2011) found that Suchia includes Gracilisuchus, Turfanosuchus, Revueltosaurus, Aetosauria, Ticinosuchus, and paracrocodylomorphs.[3]

Phylogeny[edit]

Below is the cladogram originally identified by Krebs (1974) in his definition of Suchia:[2]

Suchia


Aetosaurus ferratus


Paracrocodylomorpha

Poposauroidea


Poposaurus gracilis


Shuvosauridae


Sillosuchus longicervix



Shuvosaurus inexpectatus




Loricata

Rauisuchidae


Rauisuchus tiradentes



Crocodylomorpha


Crocodylus niloticus






Below is a phylogenetic cladogram by Butler et al. in 2011 showing the cladistics of Archosauriformes, focusing mostly on Pseudosuchia:[3] Clade names follow Nesbitt 2011.[2]


Mesosuchus




Prolacerta


Archosauriformes


Proterosuchus




Erythrosuchus




Vancleavea



Proterochampsia


Tropidosuchus



Chanaresuchus





Euparkeria



Phytosauria


Parasuchus




Smilosuchus



Pseudopalatus




Archosauria

Pseudosuchia

Ornithosuchidae


Riojasuchus



Ornithosuchus



Suchia


Gracilisuchus



Turfanosuchus




Revueltosaurus


Aetosauria


Aetosaurus




Stagonolepis



Longosuchus







Ticinosuchus


Paracrocodylomorpha

Poposauroidea


Qianosuchus



Ctenosauriscidae


Arizonasaurus



Xilousuchus



Hypselorhachis



Ctenosauriscus



Waldhaus Taxon






Poposaurus gracilis H



Poposaurus gracilis Y





Lotosaurus


Shuvosauridae


Sillosuchus




Shuvosaurus



Effigia








Loricata


Prestosuchus




Saurosuchus




Batrachotomus




Fasolasuchus



Rauisuchidae


Rauisuchus




Polonosuchus silesiacus



Postosuchus alisonae



Postosuchus kirkpatricki




Crocodylomorpha


CM 73372




Hesperosuchus agilis



Hesperosuchus "agilis"



Dromicosuchus



Alligator














Avemetatarsalia










References[edit]

  1. ^ Ezcurra, Martín D.; Fiorelli, Lucas E.; Martinelli, Agustín G.; Rocher, Sebastián; Baczko, M. Belén von; Ezpeleta, Miguel; Taborda, Jeremías R. A.; Hechenleitner, E. Martín; Trotteyn, M. Jimena (11 September 2017). "Deep faunistic turnovers preceded the rise of dinosaurs in southwestern Pangaea". Nature Ecology & Evolution. 1 (10): 1477–1483. doi:10.1038/s41559-017-0305-5. ISSN 2397-334X. 
  2. ^ a b c 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. 
  3. ^ a b 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 3194824Freely accessible. PMID 22022431. 

Cite error: A list-defined reference named "nesbitt2012" is not used in the content (see the help page).

External links[edit]