Platystega

Extinct genus of amphibians

Platystega is an extinct genus of trematosaurian temnospondyl within the family Trematosauridae.

Classification

Below is a cladogram from Steyer (2002) showing the phylogenetic relationships of trematosaurids:^[1]

Trematosauridae

Trematosaurinae

Tertrema

Luzocephalus

^ Steyer, J. S. (2002). "The first articulated trematosaur 'amphibian' from the Lower Triassic of Madagascar: implications for the phylogeny of the group". Palaeontology. 45 (4): 771–793. Bibcode:2002Palgy..45..771S. doi:10.1111/1475-4983.00260. S2CID 83515233.

see Temnospondyli
Stereospondyli	see below↓

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 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↓

Benthosuchidae

Boreopelta Mahavisaurus Nanolania Peltostega Pneumatostega Rhytidosteus Sangaia Trucheosaurus
Derwentiinae	Arcadia Acerastia Deltasaurus Derwentia Indobrachyops Rewana