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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.
Lars Johanson's proposal contains the following subgroups:
In that classification scheme, Common Turkic is opposed to Oghur Turkic (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.
In other classification schemes (such as those of Alexander Samoylovich and Nikolay Baskakov), the breakdown is different.