Dendronotus patricki, Stout, Wilson et Valdés, 2010

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

Dendronotus patricki

Stout, Wilson et Valdés, 2010

( Fig. 7D)

Material studied: MIMB42239 , 1 specimen, Sea of Okhotsk, Sakhalin Is., Bay of Patience , 49°10′4″N, 145°03′1″E, depth 262–266 m, 29 July 2019, coll. A. Mayorova. MIMB42240 , 1 specimen, Sea of Okhotsk, Sakhalin Is., Bay of Patience , 49°10′4″N, 145°03′1″E, depth 262–266 m, 29 July 2019, coll. A. Mayorova. MIMB42241 , 1 specimen, Sea of Okhotsk , NE Sakhalin Is., 52°45′0″N, 144°24′3″E, depth 261–282 m, 30 July 2019, coll. A. Mayorova.

Diagnosis: Body broad, up to 41 mm in length, light pink to brownish with opaque white dots. Large oral veil with up to nine small appendages, poorly defined rhinophoral sheath with up to six appendages, lateral papilla absent, up to six pairs of dorsolateral appendages. Jaws oval, with slightly curved masticatory border bearing at least three rows of small conical denticles. Radular formula 30 × 12.1.12. Triangular rachidian tooth, central cusp strong, conical, 9-14 denticles on each side of cusp. Lateral teeth triangle smooth blades. Large convoluted ampulla. Prostate with 22 alveolar glands. Penis elongated.

Distribution: This species has a wide range, encompassing bathyal and abyssal areas of the Arctic, the NE Pacific and the North-West Pacific [ Ekimova et al., 2021a]. In Sakhalin Island it was found in the Bay of Patience (262–266 m depth) and off the northeastern Sakhalin coast (depth 261–282 m).