FIGURE 9. Colobocephalus costellatus. A in The family Diaphanidae (Gastropoda: Heterobranchia: Cephalaspidea) in Europe, with a redescription of the enigmatic species C olobocephalus costellatus M. Sars, 1870

FIGURE 9. Colobocephalus costellatus. A. dorsal view of complete animal (automontage picture). B. ventral view of complete animal (automontage picture). C. lateral view of live animal (automontage picture). D. dorsal view of first whorls of shell (SEM). E. detail of protoconch (SEM). F. detail of shell sculpture from last whorl (SEM). G. male reproductive system. Abbreviations: f, foot; ga, genital aperture; m, mouth; mg, median groove; mt, mantle tissue; pr, prostate; ps, penial sheath; sh, shell; t, tentacle. Scale bars: A, B = 250 µm; D, G = 100 Μm; E, F = 20 µm.