Fig. 4 in Rare, deep-water and similar: revision of Sibogasyrinx (Conoidea: Cochlespiridae)

Fig. 4. Radulae of species of Sibogasyrinx Powell, 1969. A–B. S. cf. pyramidalis (Schepman, 1913) 1, MNHN-IM-2009-13451 (shell seen on Fig. 3D–F). A. Part of radula with marginal teeth not fully formed; white arrows indicate teeth that are not fully folded longitudinally (ae = anterior tooth edge; pe = posterior tooth edge). B. Part of radula with fully formed marginal teeth. C. S. cf. pyramidalis 2, MNHN-IM-2009-16972. D. S. cf. pyramidalis 2, MNHN-IM-2009-17000 (shell seen on Fig. 3M–O). E. S. subula sp. nov., MNHN-IM-2007-17703. F. S. subula sp. nov., MNHN-IM-2009-13568 (shell seen on Fig. 6H–I).