Trematosaurus

Trematosaurus is an extinct genus of temnospondyl amphibian found in Germany and Russia.[1] It was first named by Hermann Burmeister in 1849 and the type species is Trematosaurus brauni.[1]

Trematosaurus Temporal range: Early Triassic
T. brauni skull
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Amphibia
Order:	†Temnospondyli
Superfamily:	†Trematosauroidea
Family:	†Trematosauridae
Genus:	†Trematosaurus Burmeister, 1849
Species
†T. brauni Burmeister, 1849 (type) †T. galae Novikov, 2010

Classification

Below is a cladogram from Steyer (2002) showing the phylogenetic relationships of trematosaurids:[2]

Trematosauridae	Trematosaurinae      Tertrema       Lyrocephaliscus     Platystega           Luzocephalus       Trematosaurus     Trematosuchus          Lonchorhynchinae    Aphaneramma       Erythrobatrachus     Cosgriffius       Stoschiosaurus     Wantzosaurus

Species

Valid species

T. brauni

• The type species, Trematosaurus brauni (Burmeister, 1849) is known from the middle member of variegated sandstone in the vicinity of Bernburg, Germany.
• T. galae (Novikov, 2010) is known from fragmentary specimens found in Lower Triassic Donskaya Luka locality (Volgograd Region), Russia.

Reclassified species

• T. fuchsi (Seidlitz, 1920) is known from the same stratigraphic level of German Basin, Thuringia. It is a junior synonym of T. brauni.
• T. thuringiensis (Werneburg, 1993) is also known from Thuringia.
• T. madagascariensis (Lehman, 1966) referred by Schoch & Milner, 2000, to Tertremoides (Lehman, 1979).
• South African T. kannemeyeri (Broom, 1909), described based on a skull fragment, most likely belongs to the genus Aphaneramma or a closely related lonchorhynchine.
• Another South African species, T. sobeyi (Haughton, 1915), was assigned to its own genus Trematosuchus (Watson, 1919).
• East European trematosaurid remains referred to Trematosaurus in fact belong to the genus Inflectosaurus Shishkin, 1960 (Novikov, 2007).

References

1. I. V. Novikov (2010). "New data on trematosauroid labyrinthodonts of Eastern Europe: 2. Trematosaurus galae sp. nov.: Cranial morphology". Paleontological Journal. 44 (4): 457–467. doi:10.1134/S003103011004012X.CS1 maint: uses authors parameter (link)
2. Steyer, J. S. (2002). "The first articulated trematosaur 'amphibian' from the Lower Triassic of Madagascar: implications for the phylogeny of the group". Palaeontology. 45: 771–793. doi:10.1111/1475-4983.00260.