FIGURE 4 in World's northenmost and rarely observed Nudibranchs: three new Onchidoridid species (Gastropoda: Doridida) from Russian seas

FIGURE 4. Onchidoris expectata sp. nov. A–H. ZMMU Op-593, fixed holotype, 5 mm length, Kurile Ids, Matua Island; A. Dorsal view; B. Ventral view; C. Buccal pump, lateral view and central nervous system; D. Buccal pump, dorsal view; E. Dorsal view of general dissection; F. Labial cuticle (smooth), SEM; G. radular teeth, anterior and middle parts, SEM; H. radular teeth, close up of anterior view, SEM. Abbreviations: bp, buccal pump; cns, central nervous system; dg, digestive gland; e, eye; h, heart; oe, oesophagus; ph, pharynx; pm, peripheral muscle; psh, penial sheath; rh, rhinophore; rsh, radular sheath; sg, salivary gland. Scale bars: A–E—1 mm; F–H—30 µm. Photos: Tatiana Korshunova, Alexander Martynov.