Trematosauria

Trematosauria Temporal range: Early Triassic - Middle Cretaceous
Skeleton of Koskinonodon perfecta in the American Museum of Natural History
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Order:	†Temnospondyli
Clade:	†Stereospondylomorpha
Suborder:	†Stereospondyli
Clade:	†Trematosauria Romer, 1947
Clades
†Brachyopomorpha †Metoposauroidea †Plagiosauroidea †Rhytidosteoidea †Trematosauroidea

Trematosauria is one of two major groups of temnospondyl amphibians that survived the Permian-Triassic extinction event, the other (according to Yates and Warren 2000) being the Capitosauria. The trematosaurs were a diverse and important group that included many medium-sized to large forms that were semi-aquatic to totally aquatic. The group included long-snouted forms such as the trematosauroids and short, broad-headed forms such as the metoposaurs.^[1] Although most groups did not survive beyond the Triassic, one lineage, the brachyopoids, continued until the Cretaceous period.

Classification

Phylogeny

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

Trematosauria	Trematosauroidea Metoposauroidea Plagiosauroidea Rhytidosteidae Brachyopidae Chigutisauridae

References

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. e912988., 2015:
2. 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". Zoological Journal of the Linnean Society 128 (1): 77–121. doi:10.1111/j.1096-3642.2000.tb00650.x.
3. Sues, H.-D.; Fraser, N.C. (2010). Triassic Life on Land: The Great Transition. New York: Columbia University Press. p. 236. ISBN 0-231-13522-X.

External links

• Temnospondyli: Trematosauria at Palaeos
• Trematosauria at Mikko's Phylogeny Archive (cladogram)