Alvania zetlandica (Montagu, 1816)

(Fig. 7)

Material examined. (9 empty shells and 10 with soft parts, in 11 samples): SPAIN • 1 sPc (juv) + 2 sh; 43° 48.421′N, 008° 51.453′W to 43° 49.160′N, 008° 51.091′W; 599–607 m; 10–20 SeP. 2003; DIVA-Artabria I DRN-600 • 6 spc (4 juv) + 12 sh (4 juv); 43° 48.587′N, 008° 51.402′W to 43° 49.545′N, 008° 51.197′W; 610– 598 m; 10–20 SeP. 2003; DIVA-Artabria I EBS-600 • 1 sh; 43° 51.873′N, 008° 53.683′W to 43° 53.120′N, 008° 53.301′W; 802– 788 m; 10–20 Sep. 2003; DIVA-Artabria I EBS-800 • 1 sPc; Polygon delimited by Points 44° 10.000′ N, 009° 00.000′ W /44° 10.000′ N, 008° 35.000′ W/44° 00.000′ N; 009° 00.000′ W/44° 07.000′ N; 008° 35.000′ W; 480–600 m ; SARRIDAL (2006–2007) SARRI-2 • 1 sPc; Polygon delimited by Points 44° 10.000′ N, 009° 00.000′ W /44° 10.000′ N, 008° 35.000′ W/44° 00.000′ N; 009° 00.000′ W/44° 07.000′ N; 008° 35.000′ W; 417–668 m; SARRIDAL (2006–2007) SARRI-4 • 6 sh; 44° 11.652′N, 008° 58.152′W to 44° 11.539′N, 008° 57.574′W; 908–1106 m; 15–24 Jul. 2008; A SELVA DRN-7 • 25 sh; 44° 08.65′N, 008° 55.305′W to 44° 08.771′N, 008° 55.104′W; 581– 566 m; 15–24 Jul. 2008; A SELVA DRN-7 C • 2 sh; 44° 09.896′N, 008° 39.581′W to 44° 10.129′N, 008° 39.494′W; 438–459 m; 15–24 Jul. 2008; A SELVA DRN-11 • 1 sPc; 44° 07.309′N, 008° 48.289′W to 44° 07.488′N, 008° 48.047′W; 445– 438 m; 15–24 Jul. 2008; A SELVA DRN-11-5 • 1 sh; 44° 07.495′N, 008° 46.999′W to 44° 07.675′N, 008° 45.225′W; 416– 407 m; 15–24 Jul. 2008; A SELVA AT-11-2 • 1 sPc; 4211.73′N, 009° 26.19′W to 42° 11.73′N, 009° 25.63′W; 445– 326 m; 14–25 Feb. 2009; FORSAGAL DRC-6.

Remarks. It is a common species of the continental slope in the north Atlantic, from Norway to Cape Verde Islands and in the Canary Islands (Bouchet & Warén 1993; Hoenselaar & Goud 1998; Hoffman et al. 2011), also present in the western Mediterranean (Gofas & Oliver 2011). Shells with soft parts were found in samples from 350 to 600 m in sandy bottoms, and some empty shells down to 1000 m depth. The strong sculpture of the shells forms knobs at the intersection of axial ribs and spiral cords (Fig. 7a). Microsculpture of indistinct granulose spiral threads closely spaced (Figs. 7e–g). Multispiral protoconch sculptured with irregular dashes forming spiral threads adapically (Figs. 7b–c). Embryonic protoconch exhibiting a delightful reticular sculpture (Fig. 7d).