''Muchia'' is an

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

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

therapsid Therapsida is a major group of eupelycosaurian synapsids that includes mammals, their ancestors and relatives. Many of the traits today seen as unique to mammals had their origin within early therapsids, including limbs that were oriented more ...

s from the Late Permian of

Russia Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...

Fossils A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...

have been found in the

Kotelnichsky District Kotelnichsky District (russian: Коте́льничский райо́н) is an administrativeLaw #387-ZO and municipalLaw #284-ZO district (raion), one of the thirty-nine in Kirov Oblast, Russia. It is located in the west of the oblast. The area ...

Kirov Oblast Kirov Oblast (russian: Ки́ровская о́бласть, ''Kirovskaya oblast'') is a federal subject of Russia (an oblast) in Eastern Europe. Its administrative center is the city of Kirov. Population: 1,341,312 ( 2010 Census). Geography Na ...

. The

type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen ...

''M. microdenta'' was named in 2011. ''Muchia'' is known only from a fragment of the lower jaw, making its classification among therocephalians uncertain. It is thought to be within the subfamily Tetracynodontinae, part of the larger group

Baurioidea Baurioidea is a superfamily of therocephalian therapsids. It includes advanced therocephalians such as ''Regisaurus'' and ''Bauria''. The superfamily was named by South African paleontologist Robert Broom in 1911. Bauriamorpha, named by D. M. ...

. Other members of the group such as ''

Tetracynodon ''Tetracynodon'' is an extinct genus of therocephalian. Fossils of ''Tetracynodon'' have been found in the Karoo Basin of South Africa. Two species are known: the type species ''T. tenuis'' from the Late Permian and the species ''T. darti'' fro ...

'' and '' Malasaurus'' are known from more complete material, and have small elongated skulls. ''Muchia'' probably had a similar appearance to these therocephalians.

References

Extinct animals of Russia Fossil taxa described in 2011 Ictidosuchids Lopingian synapsids of Europe Therocephalia genera {{paleo-therapsid-stub