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Extinct family of tetrapods
Varanopidae is an extinct family of amniotes known from the Late Carboniferous to Middle Permian that resembled monitor lizards (with the name of the
Varanopidae
Taxonomic clade
suggested that they belong to the parareptiles. The clades Recumbirostra and Varanopidae, traditionally thought to be lepospondyls and synapsids respectively
Sauropsida
Clade of tetrapods
placed the family Varanopidae with Caseasauria as the most basal offshoot of the synapsid lineage. Reisz (1986) removed Varanopidae from Caseasauria,
Synapsida
Clade of synapsids
used instead. Some recent studies suggested that one of its subgroups, Varanopidae, are really nested within sauropsids, leaving the other defined subgroup
Eupelycosauria
Informal grouping composed of basal or primitive Late Paleozoic synapsids
Caseasauria Family Eothyrididae Family Caseidae Suborder Eupelycosauria Family Varanopidae Family Ophiacodontidae Family Edaphosauridae Infraorder Sphenacodontia
Pelycosaur
Genus of carnivorous synapsids from the Permian
Volker; Rößler, Ronny (2018). "First arboreal 'pelycosaurs' (Synapsida: Varanopidae) from the early Permian Chemnitz Fossil Lagerstätte, SE Germany, with
Dimetrodon
Extinct clade of synapsids
Laurin, Michel; Didier, Gilles (20 March 2025). "The rise and fall of Varanopidae† (Amniota, Synapsida)". Frontiers in Earth Science. 13. doi:10.3389/feart
Caseasauria
Extinct genus of lizard-like animals
Pyozia, creating uncertainty over whether characteristics at the base of Varanopidae have legitimate phylogenetic significance or instead reflect the immaturity
Dendromaia
Clade of tetrapods including mammals
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Therapsida
Extinct genus of tetrapods
dinosaurs that came much later. Varanops is the type genus of the family Varanopidae. Cladistic analysis performed by Nicolás E. Campione and Robert R. Reisz
Varanops
Geological formation of the Beaufort Group in South Africa
The Abrahamskraal Formation is a geological formation and is found in numerous localities in the Northern Cape, Western Cape, and the Eastern Cape of South
Abrahamskraal_Formation
Extinct genus of synapsids
Synapsida Caseasauria Ianthodon schultzei Edaphosauridae Sphenacodontia Varanopidae Ophiacodontidae Archaeothyris florensis Varanosaurus acutirostris Ophiacodon
Archaeothyris
Extinct genus of tetrapods
not render Orovenator a synapsid; rather, it supported a placement for Varanopidae within Sauropsida. A varanopid position for Orovenator within Sauropsida
Orovenator
Extinct genus of varanopid amniote
widespread. Ascendonanus was originally described as a member of the Varanopidae. The taxonomic position of varanopids is currently debated between synapsids
Ascendonanus
Extinct genus of synapsids
Mesenosaurus is an extinct genus of synapsid belonging to the family Varanopidae. This genus includes two species: the type species Mesenosaurus romeri
Mesenosaurus
Extinct family of vertebrate animals
also represent one of only two basal synapsid groups (the other being Varanopidae) to survive in therapsid-dominated terrestrial communities. Thus, the
Caseidae
Extinct genus of reptiles
"The phylogeny of early amniotes and the affinities of Parareptilia and Varanopidae". Nature Ecology & Evolution. 4 (1): 57–65. doi:10.1038/s41559-019-1047-3
Hylonomus
Extinct genus of synapsids
Amniota Captorhinus spp. Protorothyris archeri Synapsida Ophiacodontidae Varanopidae Caseasauria Ianthodon schultzei Edaphosauridae Sphenacodontia Haptodus
Pantelosaurus
Extinct family of therapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Nikkasauridae
Extinct genus of amniotes
Anningia is an extinct genus in Varanopidae, a family of monitor lizard-like amniotes. It contains a single species, Anningia megalops. The species was
Anningia
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Edaphosaurus
Edaphosaurid synapsid genus from the Late Carboniferous
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Melanedaphodon
Clade of reptiles with two holes in each side of their skulls
"The phylogeny of early amniotes and the affinities of Parareptilia and Varanopidae". Nature Ecology & Evolution. 4 (1): 57–65. doi:10.1038/s41559-019-1047-3
Diapsid
Extinct genus of synapsids
Eotitanosuchia by Carroll. Reisz and collaborators assigned the genus in Varanopidae. Based on comparisons of its vertebrae with other varanopids, it was
Watongia
Extinct family of synapsids
Amniota Captorhinus spp. Protorothyris archeri Synapsida Ophiacodontidae Varanopidae Caseasauria Ianthodon schultzei Edaphosauridae Ianthasaurus hardestiorum
Edaphosauridae
Clade of tetrapods
Clades Synapsida Sauropsida incertae sedis †Casineria? †Kraterokheirodon †Diadectomorpha? †Araeoscelidia? †Captorhinidae? †Protorothyrididae? †Varanopidae
Amniote
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Ophiacodon
Family of reptiles
"The phylogeny of early amniotes and the affinities of Parareptilia and Varanopidae". Nature Ecology & Evolution. 4 (1): 57–65. doi:10.1038/s41559-019-1047-3
Protorothyrididae
Extinct genus of tetrapods
meaning "lizard") is an extinct genus of amniotes belonging to the family Varanopidae. It is classified in the varanopid subfamily Mycterosaurinae. Mycterosaurus
Mycterosaurus
Genus of fossil reptile
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Mirasaura
Extinct genus of synapsids
Synapsida Caseasauria Ianthodon schultzei Edaphosauridae Sphenacodontia Varanopidae Ophiacodontidae Archaeothyris florensis Varanosaurus acutirostris Ophiacodon
Varanosaurus
Genus of extinct reptiles
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Quasicolognathus
Extinct species of synapsid
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
"Haptodus"_garnettensis
Extinct genus of synapsids
Varanopidae Ophiacodontidae Sphenacomorpha Edaphosauridae Sphenacodontia Ianthodon schultzei Haptodus garnettensis Pantelosaurus saxonicus Sphenacodontoidea
Ianthodon
Extinct genus of synapsids
Eupelycosauria Varanopidae Ophiacodontidae Haptodontiformes Ianthodon schultzei "Haptodus" garnettensis Kenomagnathus scottae Haptodus bayleyi "Tenuacaptor
Kenomagnathus
Amphibians and reptiles of the period
Araeoscelidia Family Petrolacosauridae Class Synapsida Order Pelycosauria Family Varanopidae Family Ophiacodontidae Family Edaphosauridae Family Sphenacodontidae
List of Carboniferous tetrapods
List_of_Carboniferous_tetrapods
Extinct family of reptiles
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Askeptosauridae
Extinct genus of tetrapods
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Protoclepsydrops
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Remigiomontanus
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Stereorachis
Extinct genus of tetrapods
Varanodon is an extinct genus of amniotes from the family Varanopidae. It has been found in the Chickasha Formation of Oklahoma, which dates to the Roadian
Varanodon
Extinct genus of tetrapods
synapsid pelycosaurs from the extinct family Varanopidae. Like all that resemble members of Varanopidae, Thrausmosaurus most likely resembled the modern
Thrausmosaurus
Extinct genus of tetrapods
Pelletier (2014). "First European record of a varanodontine (Synapsida: Varanopidae): member of a unique Early Permian upland paleoecosystem, Tambach Basin
Tambacarnifex
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Clepsydrops
Extinct family of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Sphenacodontidae
Extinct genus of tetrapod
Aerosaurus (meaning "copper lizard") is an extinct genus within Varanopidae, a family of non-mammalian synapsids. It lived between 252-299 million years
Aerosaurus
Extinct genus of tetrapods
classification Kingdom: Animalia Phylum: Chordata Clade: Synapsida Family: †Varanopidae Subfamily: †Varanopinae Genus: †Elliotsmithia Broom, 1937 Type species
Elliotsmithia
Genus of extinct early sauropsids
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Akkedops
Extinct genus of reptiles
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Kudnu
Extinct genus of synapsids
Cotylorhynchus Eupelycosauria Ophiacodontidae Archaeothyris Ophiacodon Varanopidae Archaeovenator Mesenosaurus Mycterosaurus Elliotsmithia Aerosaurus Varanops
Oedaleops
Clade comprising turtles, birds and crocodilians
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Archelosauria
Extinct family of synapsids
Varanosaurus acutirostris Ophiacodon spp. Stereophallodon ciscoensis Varanopidae Archaeovenator hamiltonensis Pyozia mesenensis Mycterosaurus longiceps
Ophiacodontidae
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Tetraceratops
Amphibians and reptiles of the geological period
Synapsida Order Pelycosauria Family Eothyrididae Family Caseidae Family Varanopidae Family Ophiacodontidae Family Edaphosauridae Family Sphenacodontidae
List_of_Permian_tetrapods
Extinct genus of reptiles
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Icarosaurus
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Stereophallodon
Extinct genus of reptiles
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Cryptovaranoides
Genus of drepanosauromorph reptiles
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Fabanychus
Clade of therapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Eutheriodontia
Extinct infraorder of mammals
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Phthinosuchia
Genus of extinct stem-reptile
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Scyllacerta
Clade of synapsids
Synapsida Caseasauria Eupelycosauria Varanopidae Ophiacodontidae Sphenacomorpha Edaphosauridae Sphenacodontia Haptodus Ianthodon Palaeohatteria Pantelosaurus
Sphenacodontia
Extinct genus of reptiles
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Longisquama
Extinct species of synapsid
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Dimetrodon_borealis
Extinct genus of synapsids
Eupelycosauria Varanopidae Ophiacodontidae Sphenacomorpha Edaphosauridae Sphenacodontia Haptodus Ianthodon Palaeohatteria Pantelosaurus Sphenacodontoidea
Haptodus
Extinct genus of tetrapods
extinct species of basal synapsids, known as pelycosaurs, in the family of Varanopidae during the middle Permian. At first H. scholtzi was mistakenly classified
Heleosaurus
Genus of drepanosaurid reptiles
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Unguinychus
Extinct group of saber-toothed therapsids from the Permian
only two families: Watongiidae and Gorgonopidae. Watongia was moved to Varanopidae in 2004 by the Canadian paleontologists Robert R. Reisz and Michel Laurin
Gorgonopsia
Extinct genus of reptile from the early Permian of South Africa
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Mesosaurus
Paraphyletic grouping of reptiles
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Anapsid
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Hypselohaptodus
Extinct genus of synapsids
ten skulls, hence the name of the bone bed), a dozen skeletons of the Varanopidae Varanops, and fragments of Seymouria and Captorhinus. Many of the bones
Casea
Clade of therapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Theriodontia
Extinct genus of early reptiles
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Nanomilleretta
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Vaughnictis
Extinct order of reptiles
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Eosuchia
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Lupeosaurus
Extinct genus of therapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Chthomaloporus
Extinct genus of reptiles
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Weigeltisaurus
Extinct genus of synapsid
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Martensius
Extinct genus of synapsids
Amniota Captorhinus spp. Protorothyris archeri Synapsida Ophiacodontidae Varanopidae Caseasauria Ianthodon schultzei Edaphosauridae Sphenacodontia Haptodus
Cutleria_wilmarthi
Extinction event around 260 million years ago
Laurin, Michel; Didier, Gilles (19 March 2025). "The rise and fall of Varanopidae† (Amniota, Synapsida)". Frontiers in Earth Science. 13 1544451. Bibcode:2025FrEaS
Capitanian mass extinction event
Capitanian_mass_extinction_event
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Sphenacodon
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Cryptovenator
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Tappenosaurus
Extinct genus of tetrapods
Volker; Rößler, Ronny (2018). "First arboreal 'pelycosaurs' (Synapsida: Varanopidae) from the early Permian Chemnitz Fossil Lagerstätte, SE Germany, with
Asaphestera
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Ianthasaurus
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Trichasaurus
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Steppesaurus
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Palaeohatteria
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Secodontosaurus
Extinct genus of therapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Driveria
Extinct genus of early reptiles
†Acleistorhinidae ⊞ †Delorhynchus cifellii †Feeserpeton oklahomensis ⊟ †Varanopidae ⊞ †Orovenator mayorum †Archaeovenator hamiltonensis †Heleosaurus scholtzi
Galesphyrus
Extinct family of tetrapods
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Captorhinidae
Extinct genus of reptiles
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Millerosaurus
Extinct genus of tetrapods
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Nitosaurus
Extinct clade of reptiles
sauropsids Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae Other taxa Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea
Drepanosauromorpha
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Echinerpeton
Extinct genus of therapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Reiszia
Extinct genus of synapsids
Martensius Oromycter Phreatophasma Ruthenosaurus Trichasaurus Eupelycosauria †Varanopidae? Apsisaurus Archaeovenator Ascendonanus? Eoscansor Dendromaia Nitosaurus
Neosaurus
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