Dendronotus zakuro Martynov & Fujiwara & Tsuchida & Nakano & Sanamyan & Sanamyan & Fletcher & Korshunova 2020, sp. nov.

• Main Authors: Martynov, Alexander, Fujiwara, Yoshihiro, Tsuchida, Shinji, Nakano, Rie, Sanamyan, Nadezhda, Sanamyan, Karen, Fletcher, Karin, Korshunova, Tatiana
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Gastropoda; Nudibranchia; Dendronotidae; Dendronotus; Dendronotus zakuro; Kamchatka
• Online Access: https://doi.org/10.5281/zenodo.3704157

Dendronotus zakuro sp. nov. (Figures 1, 3, 5B) http://zoobank.org/ 3B54EB14-A55E-42C5-B962-82D6A40B9BF5 Type material. Holotype, ZMMU Op-700, 30 mm long live, 15 mm preserved, dissected, Russia, Kamchatka, Starichkov Island, 17.07.2015, depth— 12 m, on stones, collector N.P. Sanamyan. Two paratypes, KSNHM-OP0485, Japan, Hokkaido, Usujiri, 10 and 12 mm long (preserved), 13.03.2016, depth 10–20 m, stones, collector Sho Kashio One paratype, ZMMU Op-664, 25 mm long live, Japan, Honshu, Echizen Coast, Fukui Prefecture, 19.04.2018, depth 7.1 m, collector Chihiro Dairi. Type locality. Russia (Kamchatka) and Japan (Hokkaido; Honshu: Sea of Japan). Etymology. From zakuro ( ẈŽo , HAE×ďAE ), meaning in Japanese “pomegranate”, after a striking red to red-brownish colouration of the new species. Diagnosis. Body elongate, 6–7 pairs dorsolateral appendages, colour bright reddish to reddish-brownish with opaque white spots, central tooth completely smooth (in adults), lacking denticles and furrows, vas deferens moderate in length, penis massive, long, twisted. Description. Body elongate, up to 30 mm in length (Fig. 3 A–E), 5–7 branched appendages of oral veil, ca. 5 appendages of rhinophoral stalks, 10–11 rhinophoral lamellae, branched rhinophoral lateral papilla present, 6–7 pairs dorsolateral appendages, 25–30 lip papillae. Dorsolateral appendages with elongate primary stalk, moderately relatively highly branched secondary branches, and attenuated tertiary branches (Fig. 3 A–E). Reproductive and anal openings placed laterally on right side. General colour bright red to reddish-brownish with thin white broken lines between dorsolateral appendages, also scattered opaque white dots and speckles on dorsal and lateral sides, and on various appendages (Fig. 3 A, D, E). The jaws are ovoid with strong dorsal processes, denticles present (Fig. 3 F–G). Masticatory processes bear up to 120 denticles. Radula formula is 36 × 3–11.1.11–3 (holotype), 34 × 3–12.1.12–3 (paratype, 12 mm). Central tooth completely devoid of denticles and ...