Zelentia roginskae Korshunovа & Fletcher & Lundin & Picton & Mаrtynov 2018, sp. nov.

• Main Authors: Korshunovа, Tаtiаnа, Fletcher, Kаrin, Lundin, Kennet, Picton, Bernаrd, Mаrtynov, Аlexаnder
• Format: Other/Unknown Material
• Language: unknown
• Published: 2018
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Gastropoda; Nudibranchia; Tergipedidae; Zelentia; Zelentia roginskae; White Sea
• Online Access: https://zenodo.org/record/5970255; https://doi.org/10.5281/zenodo.5970255

Zelentia roginskae sp. nov. (Figures 1–2; 5, 7C) http://zoobank.org/E4578C12-DE19-4081-9E4D-56А252АD7F68 Type Material. Holotype, ZMMU Op-624, 17 mm in length (live), NE Аtlantic, White Sea, Cape Kartesh, depth 18 m, stones, collector Tatiana Korshunova, 13.07.2013. Paratype, ZMMU Op-625, 8 mm in length (live), same locality, depth 19 m, stones, collector Tatiana Korshunova, date 19.07.2014. Type locality. White Sea. Etymology. This species named in honour of Irina Simonovna Roginskaya (1933–2011), who devoted almost her whole life to the study of White Sea nudibranchs. Description. External morphology. The length of the holotype is 17 mm (Fig. 5 А–E). The length of the studied specimens ranges from 8 to 17 mm. The body is narrow. The rhinophores are smooth and similar in size to the oral tentacles. The cerata are relatively long, finger-shaped. Ceratal formula of the holotype: right (2,4,6,6,7; anus, 6,6,5,5,3,2,1) left (1,3,6,5,6; 6,4,3,2,2,1). The foot is narrow, anteriorly rounded, no foot corners. Colour. The basal colour is whitish. The digestive branches in the cerata are red-orange to orange-beige. Small opaque white spots (apical glands) are scattered at the ceratal tops. There are white spots throughout most of the length of the cerata, and white encrustations on the rhinophores and oral tentacles. Anatomy. Digestive system. The jaws are triangularly ovoid (Fig. 5G) The masticatory processes of the jaws bear a single row of low, barely conspicuous denticles (Fig. 5H). The radular formula in the holotype is 27 x 0.1.0. The radular teeth are yellowish. The central tooth is narrow, elongated, with low cusp and 5–8 lateral denticles, including few intercalating smaller denticles, commonly at central cusp of some teeth (Fig. 5I, J, K). Reproductive system. (Fig. 7C). The ampulla is moderately short and swollen (Fig. 7C, a). The prostate is a slightly convoluted tube (Fig. 7C, pr). The prostate transits to a penial sheath, which contains a conical penis with a basally slightly curved chitinous stylet (Fig. ...