Dendronotus velifer G. O. Sars 1878

Dendronotus velifer G.O. Sars, 1878

Fig. 7

Dendronotusvelifer G.O. Sars, 1878:238–239, Pl. 15, Fig. 4, Pl. 28, Fig. 2; Lundin et al., 2017: 303–309, 310–318, Figs 1, 2, 4.

Non D. velifer auct. (mix-up with D.robustus and D. bathyvela).

Extended diagnosis. Body wide. Four to six pairs of branched dorsolateral appendages. Six to twelve main appendages on oral veil. Four to five appendageson rhinophoralstalks. Lateral papilla of rhinophoral sheaths absent orvery small.Rhinophoreswith 12–15lamellae. 30–35 lip papillae. Basal colour commonly light-to bright red with scattered white dots. Dorsal processes of jaws inclined posteriorly at approximately 65° to the longitudinal axis of the jaw body and 0.55 of its length. Masticatory processes with denticles. Radula with up to 36 rows of teeth. Central tooth with low to moderate cusp and up to 26 small distinct denticles without furrows. Up to 15 lateral teeth with which is smooth or with up to four rudimentary denticles. Ampulla twolooped. Bursa copulatrix large, rounded, with small seminal receptaculum placed distally at some distance from the vaginal opening. Prostate discoid with more than 50 alveolar glands. The vasdeferensis moderatein length, penis thin, long. Body length up to 90 mm.

Distribution. North Atlantic (southern limit – Gullmarfjord, Sweden) and Arctic (at least to the Laptev Sea), Norway and Russia.

Bathymetry. Commonly found below 50 m depth, in the Arctic not shallower than 10 m.

Remarks. See Remarks for D. robustus.