Cenomanian ammonoid Calycoceras (Calycoceras) naviculare (Mantell, 1822) (Acanthoceratidae, Ammonoidea) was found in the well-known section of Selbukhra Mountain in the vicinity of Nauchnyi Town of southwestern Crimea. This is the first find of the ammonoid in the upper Cenomanian deposits in the Crimea and in Russia.
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E. Yu. Baraboshkin (2024) studied this question.
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