''Porosteognathus'' is an extinct genus of

therocephalian Therocephalia is an extinct clade of therapsids (mammals and their close extinct relatives) from the Permian and Triassic periods. The therocephalians ("beast-heads") are named after their large skulls, which, along with the structure of their te ...

therapsids. Remains have been found at Isheevo in Russia (

Republic of Tatarstan Tatarstan, officially the Republic of Tatarstan, sometimes also called Tataria, is a Republics of Russia, republic of Russia located in Eastern Europe. It is a part of the Volga Federal District; and its capital city, capital and largest city i ...

).Michael J. Benton, Mikhail A. Shishkin, David M. Unwin, and Evgenii N. Kurochkin (2003): ''The Age of Dinosaurs in Russia and Mongolia'', Cambridge University Press It is known from the Middle Permian.

References

Extinct animals of Russia Scylacosauridae Therocephalia genera Fossil taxa described in 1955 {{paleo-therapsid-stub