Dendronotus elegans Verrill 1880

• Main Authors: Korshunova, Tatiana, Bakken, Torkild, GrØtan, Viktor V., Johnson, Kjetil B., Lundin, Kennet, Martynov, Alexander
• Format: Other/Unknown Material
• Language: unknown
• Published: 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Gastropoda; Nudibranchia; Dendronotidae; Dendronotus; Dendronotus elegans; Arctic; Barents Sea; Laptev Sea; White Sea; laptev; North Atlantic
• Online Access: https://zenodo.org/record/4623973; https://doi.org/10.5281/zenodo.4623973

Dendronotus elegans Verrill, 1880 Figs 7, 8 Dendronotuselegans Verrill, 1880: 385–386. Dendronotus “elongatus”: Roginskaya, 1987: 175 (lapsus calami for D. elegans Verrill, 1880). Dendronotus niveus Ekimova, Korshunova, Shepetov, Neretina, Sanamyan & Martynov, 2015: 864–869, Figs 6D, 8F, 13B, 14, 15 syn. nov.; Valdés et al., 2017: 6–7, 4B, 5B. Dendronotusdalli sensu Bergh, 1886 (non Bergh, 1879); Robilliard, 1970: 452; Bleakney, 1996: 109 (D. elegans incorrectly mentioned as synonym of D. dalli). Extended diagnosis. Body relatively narrow. Five to ten pairs of branched dorsolateral appendages. Six to nine appendages of oral veil. Four to five appendages (equal in size or few posterior ones longer) of rhinophoral stalks. Lateral papilla of rhinophoral sheaths present. Rhinophoreswith 8–23 lamellae. Lip papillae 8–50. Basal colour uniform, pinkish to light orange, with internal opaque white pigment of tips of dorsolateral appendages. Dorsalprocessesof jawsinclinedposteriorly at approximately 40° to the longitudinal axis of thejawbodyand 0.43of itslength.Masticatory processes apparently bear denticles (which may possess ridge-like structures). Radula with up to 42 rows of teeth. Central tooth completely smooth in adults. Up to at least 13 lateral teeth with up to eight denticles (can be more). Bursa copulatrix large, oval. Seminal receptaculum small placed distally at a moderately short distance from the vaginal opening. Prostate discoid with up to 60 and more alveolar glands (their number was considerably underestimated in the original description of its new synonym D. niveus (see remarks below). The vas deferens is moderate in length, penis strong, conical. Body length upto 70 mm. Distribution. North Atlantic (known southern limit – Cape Cod, USA) to the Arctic (including Barents Sea and White Sea, known northeastern limit is the Laptev Sea, Russia). Bathymetry. 10–25 m (WhiteSea) to 258 m depth (western North Atlantic). Remarks. Ekimova et al. (2015) overlooked important details in the original description ...