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Extinct genus of tetrapods
first named by Michel Laurin in 1991 and the type species is Apsisaurus witteri. Apsisaurus witteri is known from the holotype MCZ 1474, a three-dimensionally
Apsisaurus
Extinct family of tetrapods
lacked these adaptations and were probably terrestrial. Family Varanopidae Apsisaurus Archaeovenator Ascendonanus (or a non-synapsid neoreptilian) Basicranodon
Varanopidae
Genus of carnivorous synapsids from the Permian
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Dimetrodon
Clade of tetrapods including mammals
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Therapsida
Extinct family of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Eothyrididae
Extinct genus of synapsid
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Martensius
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Datheosaurus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Eocasea
Extinct genus of therapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Mastersonia
Clade of therapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Eutheriodontia
Geologic formation in Texas, United States
specimens are also known from the formation. Some notable synapsids include Apsisaurus witteri, Edaphosaurus boanerges, Ophiacodon uniformis, and Dimetrodon
Archer_City_Formation
Extinct genus of tetrapods
2011-05-22. Robert R. Reisz, Michel Laurin and David Marjanovic (2010). "Apsisaurus witteri from the Lower Permian of Texas: yet another small varanopid synapsid
Archaeovenator
Extinct genus of tetrapods
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Protoclepsydrops
Extinct genus of lizard-like animals
Varanopidae Archaeovenator hamiltonensis Apsisaurus witteri Dendromaia unamakiensis Pyozia mesenensis Mycterosaurinae Mycterosaurus longiceps Mesenosaurus
Dendromaia
Extinct genus of therapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Raranimus
Extinct family of therapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Nikkasauridae
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Secodontosaurus
Extinct family of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Sphenacodontidae
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Remigiomontanus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Stereorachis
Extinct genus of varanopid amniote
was placed in the Varanopidae, in a basal position as sister species of Apsisaurus by the original authors in 2018. In 2025, Jenkins et al. revised the phylogeny
Ascendonanus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Lupeosaurus
Clade of therapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Theriodontia
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Edaphosaurus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Archaeothyris
Extinct family of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Edaphosauridae
Extinct species of synapsid
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
"Haptodus"_garnettensis
Extinct family of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Ophiacodontidae
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Steppesaurus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Varanosaurus
Clade of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Sphenacodontia
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Ctenorhachis
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Cotylorhynchus
Extinct genus of lizard-like animals
with thick, hook-shaped caudal ribs proportionally similar to those of Apsisaurus. Preserved portions of the shoulder girdle indicate that Cabarzia had
Cabarzia
Extinct genus of therapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Driveria
Extinct genus of tetrapods
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Varanops
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Casea
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Ophiacodon
Extinct species of synapsid
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Dimetrodon_borealis
Clade of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Eupelycosauria
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Phreatophasma
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Watongia
Extinct genus of tetrapods
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Tambacarnifex
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Stereophallodon
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Haptodus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Caseopsis
Extinct genus of tetrapods
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Varanodon
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Tetraceratops
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Ctenospondylus
Extinct genus of therapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Mnemeiosaurus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Vaughnictis
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Clepsydrops
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Macromerion
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Xyrospondylus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Alierasaurus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Ennatosaurus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Gorgodon
Extinct genus of tetrapods
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Elliotsmithia
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Neosaurus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Tappenosaurus
Extinct genus of tetrapods
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Nitosaurus
Extinct genus of tetrapod
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Aerosaurus
Extinct family of Permian organisms
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Palaeohatteriidae
Extinct genus of tetrapods
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Mycterosaurus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Echinerpeton
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Pantelosaurus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Cryptovenator
Extinct family of vertebrate animals
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Caseidae
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Ianthasaurus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Glaucosaurus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Ianthodon
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Palaeohatteria
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Milosaurus
Edaphosaurid synapsid genus from the Late Carboniferous
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Melanedaphodon
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Dimacrodon
Genus of extinct non-mammalian synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Shashajaia
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Angelosaurus
form †Anomalesia †Anomphalus †Aphetoceras †Aphlebia †Apsisaurus – type locality for genus †Apsisaurus witteri – type locality for species †Araeoscelis –
List of the prehistoric life of Texas
List_of_the_prehistoric_life_of_Texas
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Sphenacodon
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Cutleria_wilmarthi
Extinct clade of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Caseasauria
Extinct genus of therapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Chthomaloporus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Oedaleops
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Eothyris
Extinct genus of tetrapods
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Ruthiromia
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Baldwinonus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Trichasaurus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Caseoides
Extinct infraorder of mammals
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Phthinosuchia
Genus of varanopids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Eoscansor
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Hypselohaptodus
Anglosaurus Bruner 1991 Sic N/A N/A Incorrect spelling for Angelosaurus Apsisaurus Laurin 1991 Valid. Lower Permian United States of America Formerly assigned
List_of_pelycosaurs
Extinct genus of tetrapods
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Pyozia
1096-3642.1991.tb00886.x. Reisz, R.R.; Laurin, M.; Marjanovic, D. (2010). "Apsisaurus witteri from the Lower Permian of Texas: yet another small varanopid synapsis
1991_in_paleontology
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Callibrachion
Extinct genus of tetrapods
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Thrausmosaurus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Oromycter
Extinct genus of tetrapods
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Heleosaurus
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Euromycter
Extinct genus of synapsids
Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus? Pyozia Thrausmosaurus
Mesenosaurus
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