Coryphella nobilis A. E. Verrill, 1880

Ekimova, Irina A., Grishina, Darya Yu. & Nikitenko, Ekaterina D., 2024, Nudibranch molluscs of Sakhalin Island, Northwestern Pacific: new records and descriptions of two new species, Ruthenica, Russian Malacological Journal 34 (2), pp. 69-91 : 82

Coryphella nobilis A. E. Verrill, 1880

( Fig. 7E)

Material studied: MIMB40022 , MIMB40023, 2 specimens, Sea of Okhotsk , Severny Bay, 54°27’9”N, 142°14’18.0”E, 38 m depth, 31 July 2019, coll. A. Mayorova.

Diagnosis: Body wide, narrowing posteriorly, up to 19 mm in length, translucent white. Rhinophores wrinkled, orange to light brown with white tips. Cerata orange to red, arranged in continuous rows. Jaws oval-shaped with 9–12 rows of small conical denticles on slightly curved masticatory border. Radular formula 18 × 1.1.1. Triangular rachidian tooth, small conical cusp non-compressed by adjacent denticles, and 6–7 denticles on each side. Lateral teeth broad, triangular, with 11–13 denticles. Ampulla coiled, narrow.Vas deferens slightly curved, short, widened. Penis lobe-shaped.

Distribution: This species has a wide distribution in boreal Atlantic and Arctic waters, having been recorded from different localities of the North Atlantic, subarctic and Arctic waters [ Ekimova et al., 2022a]. It was recently discovered on Sakhalin Island [ Ekimova et al., 2022a].