Episcomitra angelesae n. sp. (Fig. 1-2)

urn:lsid:zoobank.org:act: B226BD4A-80B2-4C8A-821A-9B42FD7A9161

Type material:

Holotype, lv (20.4 ×7.0 mm), 36.5420°N, - 02.8196°W, 313 m depth, 12 Aug. 2021, CIRCAESAL 0721 expedition, R/V “Angeles Alvariño”, ROV 25, ROV suction sample on coral rubble, MNCN 15.05 /200151H.

Paratypes: 4 lv (19.5 × 6.7 mm to 21.6 × 8.5 mm) and 6 dd (12.7 × 4.5 mm to 21 × 7.4 mm), same data as for the holotype, MNCN 15.05 /200151P.

Other material examined:

Alboran ridge, -1 dd (21.0 × 7.7 mm), 36.030°N, - 02.850°W, 175-200 m depth, 4 Sep. 1958, R/V “Calypso” sta. 1305, volcanic rock with gorgonians, Dendrophyllia and large brachiopods, MNHN. • 1 dd (17.3 × 6.3 mm), 35.9012°N. - 03.0268°W to 35.8968°N, -03.0235°W, 240-243 m, 22 Sep. 2011, INDEMARES Alborán expedition, R/V “ Isla de Alborán”, sta. BV11, beam trawl on muddy bioclastic gravel • 7 dd (old shells; 17.0 × 6.7 to 22.0 × 8.0 mm), 35.7953°N, - 03.2998°W, 135-152 m, 22 Jul. 2012, INDEMARES Alborán expedition, R/V “ Isla de Alborán”, sta. DR44, rock dredge on bioclastic gravel.

Seco de los Olivos.– 1 dd. (17.4 × 6.1 mm), 36.3758°N, - 02.8193°W, 321 m, 24 Oct. 2016, ATLAS/MEDWAVES 0916 expedition, R/V “Sarmiento de Gamboa”, sta. VV 37, grab sample, hemipelagic sand with abundant coral remains (Madrepora, Lophelia, Caryophyllia). • 1 dd. (22.0 × 7.6 mm), 36.5366°N, - 02.8203°W, 250 m, 24 Oct. 2016, ATLAS/MEDWAVES 0916 expedition, R/V “Sarmiento de Gamboa”, sta. VV 39, grab sample, mud and gravels with coral rubble (Madrepora).

Type locality: NE of Seco de los Olivos, 36.5420°N, - 02.8196°W, 313 m.

16 Medit. Mar. Sci., 23/1 2022, 14-24

Etymology: the species is dedicated to R/V “Angeles Alvariño”, the captain and crew of this research vessel as well as the scientific party of the CIRCAESAL 0721 expedition, with a particular mention for the ROV pilots who made possible the collection of the living specimens (see Acknowledgements section).

Description of the holotype: Shell medium sized (20.4 mm), fusiform with last whorl 63% of total height in apertural view. Protoconch multispiral, with a little more than 3 smooth, slightly convex whorls, with a diameter of 0.8 mm at contact with teleoconch; whitish in colour. Teleoconch of nearly 6 whorls. Spire whorls slightly convex, with a deeply incised suture; early spire whorls incised by narrow spiral grooves (6 on second teleoconch whorl, 8 less distinct on fourth, ca 10 very slight on penultimate whorl above the insertion of outer lip). Spiral grooves with regularly spaced punctures along the grooves until the 4th whorl, becoming less conspicuous on the two last

Medit. Mar. Sci., 23/1 2022, 14-24

whorls, indistinct on the last whorl. No axial sculpture except for growth lines. Last whorl with maximum convexity above mid-whorl, with nearly straight or slightly concave profile towards the abapical part; no definite fasciole around siphonal canal. Aperture elongate, with outer lip definitely bent at its insertion on the preceding whorl, then with very slightly convex profile in apertural view; adapical sinus indistinct. Parietal and columellar callus thin, continuous, sharply delimited, appressed. Columella with three definite, oblique columellar folds, blunt, the abapical one weaker, and a hardly visible fourth fold abapically to these. Outer lip not thickened but with a rounded edge. Siphonal canal moderately short, moderately wide, straight with incised siphonal notch. Colour of teleoconch uniformly tawny. Living animal with a pure white head-foot and some opaque white blotches over the siphon.

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