Fig. 2 in Lower Turonian record of belemnite Praeactinocamax from NW Siberia and its palaeogeographic significance

Fig. 2. Two morphotypes Praeactinocamax aff. plenus. Schematic sketches of morphotype A (A) in direct comparison with morphotype B (B) from Kazakhstan (Upper Cenomanian). Lateral sections of rostra showing alveolar end of morphotype A (C, specimen IGP KK8/15) and morphotype B (D, specimen IGP 170/11).