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.