Jaws

Korshunova, Tatiana, Fletcher, Karin, Picton, Bernard, Lundin, Kennet, Kashio, Sho, Sanamyan, Nadezhda, Sanamyan, Karen, Padula, Vinicius, Schrödl, Michael & Martynov, Alexander, 2020, The Emperor’s Cadlina, hidden diversity and gill cavity evolution: new insights for the taxonomy and phylogeny of dorid nudibranchs (Mollusca: Gastropoda), Zoological Journal of the Linnean Society 189, pp. 762-827 : 774-775

Jaws

Rounded labial disk covered by dark brown cuticle bearing distinct labial elements with commonly double to more rarely triple hook-shaped tips ( Fig. 4F–L).

Radula

Radular formulae 59 × 26.1.26 (Op-609, Norway, Fig. 5A–D), 78 × 29.1.29 (Op-680, Sweden, Fig. 5E–H), 86 × 28.1.28 (Op-675, UK, Fig. 5I–L), 70 × 36.1.36 (Op- 677, Russia, White Sea, Fig. 5M–P) and 43 × 18.1.18 (Op-682, White Sea, Fig. 6F–H). Radular teeth slightly yellowish. Central tooth rectangular, elongate to broad, and bears four to six distinct cusps ( Fig. 5C, G, K, O). Central teeth of late juveniles (subadults) almost devoid of cusps ( Fig. 6H, I). Inner lateral tooth massive with wide base and short, strong, slightly curved cusp and five to seven denticles on outer edge and two or three on inner edge ( Fig. 5B–C, F–G, J–K, N–O). Outer lateral teeth elongated hook-shaped, bearing up to 18 comb-shaped denticles ( Fig. 5D, H, L, P).