Metasuchia

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Metasuchia
Temporal range: Early Jurassic - Recent, 196.5–0 Ma
Sebecus icaeorhinus.JPG
Skull of Sebecus icaeorhinus
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Mesoeucrocodylia
Clade: Metasuchia
Benton and Clark, 1988
Clades

Metasuchia is a major clade within the superorder Crocodylomorpha. It is split into two main groups, Notosuchia and Neosuchia.[1] Notosuchia is an extinct group that contains primarily small-bodied Cretaceous taxa with heterodont dentition. Neosuchia includes the extant crocodylians and basal taxa, such as peirosaurids and pholidosaurids. It is phylogenetically defined by Sereno et al. (2001) as a clade containing Notosuchus terrestris, Crocodylus niloticus, and all descendants of their common ancestor.[2]

Phylogenetics[edit]

Metasuchia

Notosuchia

Anatosuchus

Barcinosuchus

Itasuchus

Miadanasuchus

Trematochampsa

Caririsuchus

Mahajangasuchidae

Peirosauridae

Neosuchia

The phylogeny of basal metasuchians has experienced many revisions in recent years.[1] The phylogeny of notosuchians has been particularly revised, with the construction of Sebecia by Larsson and Sues (2007) to include peirosaurids in the clade.[3] Previously, peirosaurids were placed outside Notosuchia. Larsson and Sues (2007) also suggested that Sebecosuchia (containing the families Baurusuchidae and Sebecidae) was polyphyletic, as Baurusuchus was placed outside Sebecia, which itself was placed outside Notosuchia. However, more recent phylogenetic studies have placed Baurusuchus within Notosuchia once again, although it is still not considered to be a sebecosuchian.[1]

In 2012, a phylogenetic study was done to produce supertrees of Crocodyliformes, including 184 species.[4] The most parsimonious trees were highly resolved, meaning the phylogenetic relationships found in the analysis were highly likely. As such, below is the consensus tree from the study, focusing on the Metasuchian branch of the tree.

Metasuchia
Notosuchia

Araripesuchus wegeneri

Araripesuchus tsangatsangana

Araripesuchus buitreraensis

Araripesuchus patagonicus

Araripesuchus gomesii

Uruguaysuchus terrai

Uruguaysuchus aznarezi

Libycosuchus brevirostris

Simosuchus clarki

Malawisuchus mwakasyungutiensis

Candidodon itapecuruense

Notosuchus terrestris

Comahuesuchus brachybuccalis

Mariliasuchus amarali

Yacarerani boliviensis

Pakasuchus kapilimai

Adamantinasuchus navae

Stratiotosuchus maxhechti

Pehuenchesuchus enderi

Pabwehshi pakistanensis

Iberosuchus macrodon

Eremosuchus elkoholicus

Doratodon

Bergisuchus dietrichbergi

Baurusuchus salgadoensis

Baurusuchus pachechoi

Chimaerasuchus paradoxus

Sphagesaurus huenei

Sphagesaurus montealtensis

Sebecus huilensis

Sebecus icaeorhinus

Itaborai Croc

Bretesuchus bonapartei

Anatosuchus minor

Barcinosuchus gradilis

Itasuchus jesuinoi

Miadanasuchus oblita

Trematochampsa taqueti

Caririsuchus camposi

Mahajangasuchidae

Kaprosuchus saharicus

Mahajangasuchus insignis

Peirosauridae

Hamadasuchus rebouli

Montealtosuchus arrudacamposi

Uberabasuchus terrificus

Peirosaurus torminni

Lomasuchus palpebrosus

Neosuchia

References[edit]

  1. ^ a b c Sereno, P. C.; Larsson, H. C. E. (2009). "Cretaceous crocodyliforms from the Sahara". ZooKeys. 28 (2009): 1–143. doi:10.3897/zookeys.28.325. 
  2. ^ Sereno, P. C.; Larsson, H. C. E.; Sidor, C. A.; Gado, B. (2001). "The giant crocodyliform Sarcosuchus from the Cretaceous of Africa". Science. 294 (5546): 1516–1519. doi:10.1126/science.1066521. PMID 11679634. 
  3. ^ Larsson, H. C. E.; Sues, H.-D. (2007). "Cranial osteology and phylogenetic relationships of Hamadasuchus rebouli (Crocodyliformes: Mesoeucrocodylia) from the Cretaceous of Morocco". Zoological Journal of the Linnean Society. 149: 533–567. doi:10.1111/j.1096-3642.2007.00271.x. 
  4. ^ Bronzati, M.; Montefeltro, F. C.; Langer, M. C. (2012). "A species-level supertree of Crocodyliformes". Historical Biology: 1. doi:10.1080/08912963.2012.662680. 

External links[edit]