Coryphellina exoptata (Gosliner & Willan, 1991), comb. n. Vietnam, Nhatrang Bay. ZMMU Op-116, living specimen 9 mm in length: A dorsal view B ventral view (fixed) C details of cerata D dissected anterior part (pharynx removed) and rhinophores, SEM E jaw, SEM F details of masticatory process of jaw, SEM, scale bar = 30 μm G radular teeth, posterior part, SEM H, I reproductive system, light microscopy. Abbreviations: a anus am ampulla fgm female gland mass go genital opening nd discontinuous notal edge ogp oral gland penetrating into basis of cerata ps penial sheath r rhinophores rsp proximal receptaculum seminis pvd prostatic vas deferens. Scale bars: D = 1 mm; E = 300 μm; F = 30 μm. Photos of living specimens by O.V. Savinkin, other photos and SEM images by A.V. Martynov.