Adalaria rossica Martynov & Korshunova 2017, sp. nov.

• Main Authors: Martynov, Alexander, Korshunova, Tatiana
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Gastropoda; Nudibranchia; Onchidorididae; Adalaria; Adalaria rossica; Arctic Ocean; Franz Josef Land; Kuhn island; Nansen Island
• Online Access: https://doi.org/10.5281/zenodo.6010357

Adalaria rossica sp. nov. (Figures 1, 2; 5A) http://zoobank.org/urn:lsid:zoobank.org:act:192632D5-29F7-4857-BB60-6B4101509884 Type Material. Holotype, ZMMU Op-548, (19.5 mm length, 11 mm width fixed), Arctic Ocean, Franz Josef Land, Kuhn Island, 18–31 m, leg. O.V. Savinkin, 16.08.2013. Paratypes, ZMMU Op-549, 1 specimen (16 mm length, 13.5 mm width, fixed), Arctic Ocean, Franz Josef Land, Heiss Island, 9–25 m, stones, sand, sta. G13, leg. O.V. Savinkin, 12.08.2013. ZMMU Op-550, 1 specimen (12 mm length, 12.5 mm width, fixed), Arctic Ocean, Franz Josef Land, Nansen Island, 6–21 m, stones, sand, sta. G31, leg. O.V. Savinkin, 23.08.2013. Type locality. Arctic Ocean, Franz Josef Land. Etymology. This species is named in honour of Russian underwater explorers who previously investigated marine opisthobranch fauna of the extremely cold water of Franz Josef Land and adjacent Arctic regions, including A.N. Golikov, M.V. Propp, A.F. Pushkin, B.I. Sirenko, and others, and those who collected this species in 2013, O.V. Savinkin and S.D. Grebelnyi. They have made great contributions towards the understanding of the fauna and flora of one of the most northern territories of the world. Description. External morphology. The length of the preserved holotype is 19.5 mm and width 11 mm (Fig. 2 A). The length of three preserved specimens ranged from 14 to 19.5 mm, the width ranged from 9 to 15 mm. The notum is moderately broad, rounded in front and posteriorly. The rhinophores are long and retracted into sheaths with smooth edges, except for 5–7 tubercles of various size that are connected to the edge of each sheath. There are 38–42 rhinophoral lamellae. The notum is densely covered with narrow, elongate spine-like tubercles. Tubercles in the central notal area are somewhat wider and more globular than those at the notal edge (Fig. 2 A, B). Larger tubercles are regularly intermingled with smaller ones. The rays of spicules radiating from the bases of tubercles form a sort of network under the surface of the apparently soft notum. ...