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Chthonosaurus Temporal range: Late Permian ~260–253 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Life restoration of Chthonosaurus velocidens
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Clade:	Therapsida
Clade:	†Therocephalia
Clade:	†Eutherocephalia
Genus:	†Chthonosaurus Vjuschkov 1955
Type species
†Chthonosaurus velocidens Vjuschkov 1955

Chthonosaurus is an extinct genus of eutherocephalian therapsids from the Late Permian Kutulukskaya Formation of Russia. The type species Chthonosaurus velocidens was named in 1955.

References

1. Huttenlocker, Adam K.; Sidor, Christian A.; Angielczyk, Kenneth D. (20 Jul 2015). "A new eutherocephalian (Therapsida, Therocephalia) from the upper Permian Madumabisa Mudstone Formation (Luangwa Basin) of Zambia". Journal of Vertebrate Paleontology. 35 (5): e969400. Bibcode:2015JVPal..35E9400H. doi:10.1080/02724634.2015.969400. S2CID 83554630.
2. Ivakhnenko, M.F. (2011). "Permian and Triassic therocephals (Eutherapsida) of Eastern Europe". Paleontological Journal. 45 (9): 981–1144. doi:10.1134/S0031030111090012. S2CID 128958135.

v t e Therocephalia
Kingdom: Animalia Phylum: Chordata Clade: Synapsida Clade: Therapsida Clade: Eutheriodontia Synapsida see Synapsida Therocephalia see below↓
Therocephalia Therocephalia Gorynychus Porosteognathus Cynodontia? Lycosuchidae Lycosuchus Simorhinella Scylacosauridae Alopecodon Alopecognathus Biarmosuchoides? Eutheriodon Glanosuchus Hyorhynchus Julognathus Koksharovia Maraisaurus Pardosuchus Pristerognathus Scylacosaurus Eutherocephalia Caodeyao Kotelcephalon? Nanictidops Perplexisaurus Purlovia Scylacosuchus? Cynodontia? Chthonosauridae Chthonosaurus Ichibengops Akidnognathidae Akidnognathus Annatherapsidus Cerdosuchoides Euchambersia Jiufengia Moschorhinus Notaelurodon Olivierosuchus Promoschorhynchus Shiguaignathus Zorillodontops Whaitsioidea Ophidostoma Hofmeyriidae Gorochovetzia Hofmeyria Ictidostoma Mirotenthes Whaitsiidae Dalongkoua Ictidochampsa Megawhaitsia Microwhaitsia Moschowhaitsia Theriognathus Viatkosuchus Baurioidea see below↓
Baurioidea Baurioidea Homodontosaurus Icticephalus Ictidodon Ictidodraco Ictidognathus Ictidosuchoides Ictidosuchops Ictidosuchus Jiucaiyuangnathus Macroscelesaurus Malasaurus Muchia Nanictocephalus Polycynodon Rhigosaurus Scalopocephalus Scalopodon Scalopodontes Scalopolacerta Scaloporhinus Scaloposuchus Silphictidoides Silpholestes Yikezhaogia Karenitidae Karenites Mupashi Lycideopidae Choerosaurus Lycideops Tetracynodon Regisauridae Regisaurus Urumchia Bauriamorpha Hazhenia Nothogomphodon Notictoides Ordosiodon Scaloposaurus Ericiolacertidae Ericiolacerta Pedaeosaurus? Silphedosuchus Bauriidae Antecosuchus Bauria Microgomphodon Scalopognathus Traversodontoides
Nomina dubia Alopecorhinus Arnognathus Blattoidealestes Dongusaurus Hyaenasuchus Ictidoparia Ictidosaurus Scymnosaurus Tamboeria Trochorhinus Trochosaurus Trochosuchus
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