Nikkasauridae

Extinct family of therapsids

Nikkasauridae is a family of biarmosuchian therapsids. It contains two genera Nikkasaurus and Reiszia.^[1]^[2]^[3]

References

^ M. F. Ivakhnenko, 2000. The Nikkasauridae-Problematic Primitive Therapsids from the Late Permian of the Mezen Localities. Paleontol. J. 34(Suppl. 2), 179–186.
^ M. F. Ivakhnenko. 2008. Podklass Ophiacomorpha. In M. F. Ivakhnenko and E. N. Kurochkin (eds.), Iskopaemye pozvonotchnye Rossii i sopredel'nykh stran: Iskopaemye reptilii i ptitsy, Tchast' 1 [Fossil vertebrates of Russia and adjacent countries: Fossil reptiles and birds, Part 1], GEOS, Moscow 95-100
^ Kemp, Thomas Stainforth (2005). The Origin and Evolution of Mammals. ISBN 0-19-850760-7.

Synapsida

Tetrapodomorpha

Reptiliomorpha

see Reptiliomorpha
Synapsida	see below↓

Eothyrididae	Asaphestera? Eothyris Oedaleops Vaughnictis
Caseidae	Alierasaurus Angelosaurus Arisierpeton Callibrachion Casea Caseoides Caseopsis Cotylorhynchus Datheosaurus Ennatosaurus Eocasea Euromycter Lalieudorhynchus Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus

Apsisaurus Archaeovenator Ascendonanus Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Mesenosaurinae	Anningia Cabarzia Elliotsmithia Heleosaurus Mesenosaurus Microvaranops
Varanodontinae	Aerosaurus Mycterosaurus? Ruthiromia Tambacarnifex Varanops Varanodon Watongia

Incertae sedis	†Dimacrodon †Driveria †Gorgodon †Knoxosaurus †Mastersonia †Protoclepsydrops?

†Ophiacodontidae	Archaeothyris Baldwinonus Clepsydrops Echinerpeton Ophiacodon Stereophallodon Stereorhachis Varanosaurus

†Ianthodon †Milosaurus
†Edaphosauridae	Bohemiclavulus Edaphosaurus Glaucosaurus Gordodon Ianthasaurus Lupeosaurus Melanedaphodon Ramodendron Remigiomontanus Xyrospondylus

†Shashajaia
†Sphenacodontidae	Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon Steppesaurus? Tappenosaurus? Tetraceratops?
Therapsida	see below↓