Family Pseudoscapanorhynchidae Herman, 1979
Genus Protolamna Cappetta, 1980b
Protolamna cf. sokolowi
Material. 40 teeth (3 from layer 2a, 29 from layer 2c of Melanchyn potik, 3 from layer 2e, 2 from layer 2 of Pekarskyi, 3 from Kholodnyi)
Description. Relatively large teeth (up to 1,5 cm high). Crown is elongated, sigmoid and striated on the lingual face. Both faces are convex. Labial face is reduced because of labial position of the cutting edge. Lateral cusplet cutting edge is separated from the main cusp by a notch. Labial face is smooth in anteriors; laterals can have vertical folds. Lateral cusplets follow the shape of the main cusp and are positioned at a 45° angle compared to it on anterior teeth. Root has a developed lingual protuberance with weak or absent nutrient furrow on the basal side. Intermediate teeth are almost symmetrical, have wider root than anteriors and have striated labial face. Posterior teeth have more symmetrical Archaeolamna-like cusplets but have many strong vertical folds on the labial side.
Remarks. These teeth appear to be similar to Protolamna sp. from Cenomanian of United Kingdom and France [Guinot et al., 2013], and to Protolamna carteri Cappetta & Case, 1999 from Cenomanian of Texas.

Ключевые слова (тэги): зубы, акулы, зубы акул, Elasmobranchii, Protolamna, Канев