Eutherocephalia

Purlovia is an extinct genus of herbivorous therocephalian therapsids from the Late Permian of Russia. Fossils have been found from the Tonshayevsky District of Nizhny Novgorod Oblast. The type species of Purlovia, P. maxima, was named in 2011. left|thumb|Holotype skull In comparison to other therocephalians, Purlovia had a very wide skull due to a widened temporal region. Viewed from above, it looks roughly triangular. The skull is about long, with nearly half its length in the postorbital region behind the eye sockets. It has large canine teeth and smaller buccal, or cheek teeth, along the t

Scylacosuchus is an extinct genus of therocephalian therapsids. It was a predatory eutherocephalian that lived in Lopingian epoch. Its fossils were found in Orenburg Oblast of Russia. The type species is Scylacosuchus orenburgensis.

Eutherocephalia ("true beast head") is an extinct clade of advanced therocephalian therapsids. Eutherocephalians are distinguished from the lycosuchids and scylacosaurids, two early therocephalian families. While lycosuchids and scyalosaurids became extinct by the end of the Permian period, eutherocephalians survived the Permian–Triassic extinction event. The group eventually became extinct in the Middle Triassic. == Characteristics == The Eutherocephalians evolved several mammal-like traits through convergent evolution with Cynodontia. Among those traits were the loss of palatine teeth and th

Distinguished from the Late Permian junior synonym of Akidnognathus "Hofmeyria".

Hofmeyriidae is a family of therocephalian therapsids. It includes the genus Ictidostoma and others.

Perplexisaurus is a genus of therocephalian therapsid from the Middle to Late Permian Deltavjatia vjatkensis Assemblage Zone, Vanyushonki Member of the Urpalov Formation of Russia. It was described by L. P. Tatarinov in 1997, and the type species is P. foveatus. A new species, P. lepusculus, was described by M.F. Ivachnenko in 2011, from Russia.

Caodeyao is a genus of therocephalian that lived in what is now China during the late Permian. It was found in the Naobaogou Formation. It contains one species, Caodeyao liuyufengi, named in 2020 by Jun Liu and Fernando Abdala. The authors found that its closest relative is Purlovia from Russia, forming with it an exclusively Laurasian clade.

Ictidostoma is an extinct genus of non-mammalian synapsids known from the Tropidostoma Assemblage Zone.