Talassia dagueneti (de Folin, 1873)

Figs 4–7

Salassia dagueneti – de Folin, 1868: 112, pl. 3 fig. 2.

Talassia dagueneti – Warén & Bouchet 1988: 93, fig. 45. — Bouchet & Warén 1993: 714, 717, figs 1681– 1700, 1702–1703.

Material examined

PORCUPINE BASIN – NW Porcupine Bank • 5 shells; 53.1950° N, 14.7923° W; depth 651 m; 30 Jun. 2001; box core in coral debris with sand; M2001-6 (64 PE 182); SaM. – Belgica Mound Province, Castor Mound • 7 shells; 51.4375° N, 11.7867° W; depth 994 m; 23 Apr. 2004; M61/1-215; van Veen grab; SaM. – Belgica Mound Province, Pollux Mound • 6 shells; 51.4300° N, 11.7941° W; depth 1029 m; 23 Apr. 2004; box core; M61/1-223; SaM. – Belgica Mound Province, Galway Mound • 5 shells; 51.4210° N, 11.7600° W; depth 981 m; 23. Apr. 2004; box core; M61/1-224; SaM • 121 shells; 51.4972° N, 11.7017° W; depth 845 m; 24. Apr. 2004; pelagic net; M61/1-234; SaM • 1 shell; 51.4490° N, 11.7527° W; depth 837 m; 5 Jun. 2004; box core in silt with coral rubble; M 61/3-551 (GeoB9204); SaM • 9 shells; 51.4507° N, 11.7520° W; depth 810 m; 5 Jun. 2004; box core in live corals; M 61/3-552 (GeoB9205); SaM • 56 shells; 51.4552° N, 11.7520° W; depth 857 m; 5 Jun. 2004; box core in live corals; M61/3-553 (GeoB9206); SaM • 45 shells (Figs 4–7); 51.4542° N, 11.7329° W; depth 860 m; 11 Aug. 2004; box core in live corals; POS316-524; SaM .

GULF OF CADIZ – Hesperides Mud Volcano • 3 shells; 36.1815° N, 7.3058° W; depth 676 m; 2 Dec. 2003; TV-grab; SO175-GeoB9022; SaM. – Gemini Mud Volcano • 83 shells; 35.2942° N, 6.7878° W; depth 529 m; 17 Aug. 2004; box core; Moundforce2004-4; SaM .

ALBORAN SEA – Off Alboran Island • 1 shell; depth 250 m; 2005; J. Martin leg; SaM.

Remarks

Talassia dagueneti was described from off Cape Breton, Bay of Biscay; a syntype is shown by Warén & Bouchet (1988: fig. 45; MNHN-IM-2000-5648). The species is distributed from the Porcupine Basin off Ireland to the Gulf of Cadiz, Madeira and Canary Islands and in the western Mediterranean Sea in 170–1809 m (Bouchet & Warén 1993; Segers et al. 2009; this study). The outline of the shell is more slender (Fig. 6) than that of T. coriacea (Fig. 1) and the spiral sculpture of the teleoconch has finely dotted lines; the flexuous axial riblets are equidistant (Fig. 7).