Kamassian is an extinct
Samoyedic language, included by convention in the Southern group together with
Mator and
Selkup (although this does not constitute an actual subfamily). It had two dialects, Kamassian (also known as Kamas) and Koibal. The last native speaker of the Kamassian dialect,
Klavdiya Plotnikova, died in 1989. Kamassian was spoken in
Russia, east of the
Ural mountains, by
Kamasins.