Map of the distribution of Common Turkic Languages across Eurasia
Common Turkic, or Shaz Turkic, is a taxon in some classifications of the Turkic languages that includes all of them except the Oghuric languages which had diverged earlier.
In that classification scheme, Common Turkic is opposed to the Oghuric languages (Lir-Turkic). The Common Turkic languages are characterized by sound correspondences such as Common Turkic š versus Oghuric l and Common Turkic z versus Oghuric r.
Siberian Turkic is split into a "Central Siberian Turkic" and "North Siberian Turkic" branch within the classification presented in Glottolog v4.8.[3]
^Samoylovich, Alexander (1922). Nekotorye dopolneniya k klassifikatsii turetskikh yazykov Некоторые дополнения к классификации турецких языков [Some additions to the classification of Turkish languages] (in Russian). Petrograd: Rossiyskaya Gosudarstvennaya Akademicheskaya Tipografiya.
^Baskakov, N.A. "K voprosu o klassifikacii tyurkskikh yazykov" [On the matter of the question of the classification of the Turkic languages]. Izvestiya Akademii Nauk SSSR, Otedelenie Literatury I Yazyka (in Russian). 11 (2): 121–134.
Literature
Johanson, Lars & Éva Agnes Csató (ed.). 1998. The Turkic languages. London: Routledge. ISBN0-415-08200-5.