# Trematosauria

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Extinct clade of amphibians

Trematosauria Temporal range: Early Triassic - Early Cretaceous, 252.3–120 Ma PreꞒ Ꞓ O S D C P T J K Pg N Skeleton of Anaschisma in the American Museum of Natural History Scientific classification Kingdom: Animalia Phylum: Chordata Clade: Tetrapoda Order: †Temnospondyli Suborder: †Stereospondyli Clade: †Trematosauria Yates and Warren, 2000 Clades †Brachyopomorpha †Metoposauroidea †Plagiosauroidea †Rhytidosteoidea †Trematosauroidea

**Trematosauria** is one of two major groups of [temnospondyl](/source/Temnospondyl) amphibians that survived the [Permian-Triassic extinction event](/source/Permian-Triassic_extinction_event), the other (according to Yates and Warren 2000) being the [Capitosauria](/source/Capitosauria). The trematosaurs were a diverse and important group that included many medium-sized to large forms that were semi-aquatic to fully aquatic. The group included long-snouted forms such as the [trematosauroids](/source/Trematosauroidea) and short, broad-headed forms such as the [metoposaurs](/source/Metoposauridae).[1] Although most groups did not survive beyond the [Triassic](/source/Triassic), one lineage, the [brachyopoids](/source/Brachyopoidea), continued until the [Cretaceous](/source/Cretaceous) period. Trematosauria is defined as all [stereospondyls](/source/Stereospondyli) more closely related to *[Trematosaurus](/source/Trematosaurus)* than to *[Parotosuchus](/source/Parotosuchus)*, a capitosaurian.[2]

## Classification

### Phylogeny

[Cladogram](/source/Cladogram) after Yates and Warren (2000):[2][3]

Trematosauria Trematosauroidea Metoposauroidea Plagiosauroidea Rhytidosteidae Brachyopidae Chigutisauridae

## References

1. **[^](#cite_ref-1)** Brusatte, S. L.; Butler, R. J.; Mateus, O.; Steyer, S. J. (2015). "A new species of Metoposaurus from the Late Triassic of Portugal and comments on the systematics and biogeography of metoposaurid temnospondyls". *Journal of Vertebrate Paleontology*. **35** (3) e912988. [Bibcode](/source/Bibcode_(identifier)):[2015JVPal..35E2988B](https://ui.adsabs.harvard.edu/abs/2015JVPal..35E2988B). [doi](/source/Doi_(identifier)):[10.1080/02724634.2014.912988](https://doi.org/10.1080%2F02724634.2014.912988). [S2CID](/source/S2CID_(identifier)) [84007744](https://api.semanticscholar.org/CorpusID:84007744).

1. ^ [***a***](#cite_ref-YW00_2-0) [***b***](#cite_ref-YW00_2-1) Yates, A.M.; Warren, A.A. (2000). ["The phylogeny of the 'higher' temnospondyls (Vertebrata: Choanata) and its implications for the monophyly and origins of the Stereospondyli"](https://doi.org/10.1111%2Fj.1096-3642.2000.tb00650.x). *Zoological Journal of the Linnean Society*. **128** (1): 77–121. [doi](/source/Doi_(identifier)):[10.1111/j.1096-3642.2000.tb00650.x](https://doi.org/10.1111%2Fj.1096-3642.2000.tb00650.x).

1. **[^](#cite_ref-SF10_3-0)** Sues, H.-D.; Fraser, N.C. (2010). *Triassic Life on Land: The Great Transition*. New York: Columbia University Press. p. 236. [ISBN](/source/ISBN_(identifier)) [978-0-231-13522-1](https://en.wikipedia.org/wiki/Special:BookSources/978-0-231-13522-1).

## External links

- [Temnospondyli: Trematosauria](https://web.archive.org/web/20060522101214/http://www.palaeos.com/Vertebrates/Units/160Temnospondyli/400.html) at [Palaeos](/source/Palaeos)

v t e Stereospondyli Kingdom: Animalia Phylum: Chordata Clade: Tetrapodomorpha Order: Temnospondyli Tetrapodomorpha see Tetrapodomorpha Temnospondyli see Temnospondyli Stereospondyli see below↓ Stereospondyli Stereospondyli Arachana Capulomala Peltobatrachus Lapillopsidae Lapillopsis Manubrantlia Rhigerpeton Rotaurisaurus Rhinesuchidae Australerpeton? Broomistega Laccosaurus Parapytanga? Rastosuchus Rhineceps Rhinesuchoides Rhinesuchus Uranocentrodon Lydekkerinidae Chomatobatrachus Cryobatrachus Deltacephalus Eolydekkerina Indobenthosuchus Luzocephalus? Lydekkerina Capitosauria Antarctosuchus Bukobaja Calmasuchus Capitosaurus Cherninia Cyclotosaurus Edingerella Eocyclotosaurus Eryosuchus Heptasaurus Huangfuchuansuchus Jammerbergia Kestrosaurus Kupferzellia Mastodonsaurus Meyerosuchus Odenwaldia Paracyclotosaurus Parotosuchus Quasicyclotosaurus Procyclotosaurus Promastodonsaurus Rhadalognathus Samarabatrachus Sassenisaurus Sclerothorax Selenocara Stanocephalosaurus Stenotosaurus Subcyclotosaurus Tatrasuchus Vladlenosaurus Volgasaurus Volgasuchus Warrenisuchus Watsonisuchus Wellesaurus Wetlugasaurus Xenotosuchus Yuanansuchus Trematosauria see below↓ Trematosauria Trematosauria Almasaurus Bothriceps Callistomordax Chinlestegophis Keratobrachyops Laidleria Latiscopus Qantas Rileymillerus Syrtosuchus Uruyiella Benthosuchidae Benthosuchus Kwatisuchus Trematosauridae Angusaurus Aphaneramma Cosgriffius Erythrobatrachus Gonioglyptus Hyperokynodon Icanosaurus Indolyrocephalus Inflectosaurus Lyrocephaliscus Microposaurus Panchetosaurus Platystega Prothoosuchus Stoschiosaurus Tertrema Tertremoides Thoosuchus Tirraturhinus Trematolestes Trematosuchoides Trematosaurus Trematosuchus Trematotegmen Wantzosaurus Metoposauridae Anaschisma Apachesaurus Arganasaurus Buettnererpeton Dutuitosaurus Metoposaurus Panthasaurus Rhytidosteidae Boreopelta Mahavisaurus Nanolania Peltostega Pneumatostega Rhytidosteus Sangaia Trucheosaurus Derwentiinae Arcadia Acerastia Deltasaurus Derwentia Indobrachyops Rewana Chigutisauridae Arenaerpeton Chigutisaurus Compsocerops Koolasuchus Pelorocephalus Siderops Brachyopidae Banksiops Bathignathus Batrachosaurus Batrachosuchoides Batrachosuchus Blinasaurus Brachyops Gobiops Hadrokkosaurus Notobrachyops Platycepsion Sinobrachyops Vanastega Vigilius Xenobrachyops Plagiosauridae Gerrothorax Megalophthalma Plagiobatrachus Plagiorophus Plagiosaurus Plagioscutum Plagiosternum Plagiosuchus See also: Trematosauroidea Metoposauroidea Rhytidosteoidea Brachyopomorpha Brachyopoidea Plagiosauroidea Category

Taxon identifiers Trematosauria Wikidata: Q145395 Wikispecies: Trematosauria Paleobiology Database: 150349

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Adapted from the Wikipedia article [Trematosauria](https://en.wikipedia.org/wiki/Trematosauria) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Trematosauria?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.