Talassia tenuisculpta (R.B. Watson, 1873 )

Hoffman, Leon & Freiwald, André, 2022, A review of Atlantic deep-water species in the genus Talassia (Caenogastropoda, Vanikoridae), European Journal of Taxonomy 819, pp. 140-157 : 144-145

Talassia tenuisculpta (R.B. Watson, 1873)

Figs 8–11

Rissoa tenuisculpta – R.B. Watson, 1873: 389–390, pl. 36 fig. 28.

Talassia tenuisculpta – Warén & Bouchet 1988: 93, fig. 44.

Material examined

MADEIRA – south off Porto Santo • 1 shell; 33.0167° N, 16.3500° W; depth 310 m; 16 Oct. 1978; Harmon grab; in sand; CANCAP/III-3.032 ; SaM .

DACIA SEAMOUNT • 1 shell; 31.1777° N, 13.6093° W; depth 108 m; 17 Apr. 1997; van Veen grab; in bioclastic sand; VH97-132 ; SaM • 2 shells; 31.1217° N, 13.6550° W; depth 125 m; 25 Apr. 1997; van Veen grab; in bioclastic sand; VH97-285 ; SaM .

GREAT METEOR SEAMOUNT • 1 shell; 29.7501° N, 28.4661° W; depth 292 m; 21 Mar. 2010; Shipek grab; in bioclastic sand; POS397-111-2 ; SaM • 1 shell; 29.5652° N, 28.3388° W; depth 945 m; 25 Oct. 2018; ROV sample 4 with large sponge; M151-GeoB23425 ; SaM • 1 shell; 29.5649° N, 28.3389° W; depth 948 m; 25 Oct. 2018; ROV sample 9 with coral; M151-GeoB23425 ; SaM .

LITTLE METEOR SEAMOUNT • 1 shell; 29.6451° N, 28.9750° W; depth 284 m; 27 Oct. 2018; grab in bioclastic sand; M151-GeoB23440 ; SaM • 7 shells; 29.6333° N, 28.9834° W; depth 274 m; 27 Oct. 2018; grab in bioclastic sand; M151-GeoB23442 ; SaM .

ATLANTIS SEAMOUNT • 8 shells; 33.9707° N, 30.2064° W; depth 677 m; 21 Oct. 2018; grab in bioclastic sand with coral rubble; M151-GeoB23404 ; SaM • 40 shells; 33.9965° N, 30.1767° W; 617 m; 21 Oct. 2018; grab in bioclastic sand with coral rubble; M151-GeoB23408 ; SaM .

AZORES , MAR DA PRATA • 5 shells; 37.6685° N, 25.9260° W; depth 834 m; 8 Oct. 2018; grab in bioclastic sand; M151-GeoB23109 ; SaM • 37 shells ( Figs 8–11 ); 37.6732° N, 25.9246°W; depth 595 m; 8 Oct. 2018; grab in bioclastic sand with coral rubble; M151-GeoB23111 ; SaM • 15 shells; 37.6607° N, 25.9180° W; depth 599 m; 8 Oct. 2018; grab in bioclastic sand with coral rubble; M151-GeoB23112 ; SaM • 3 shells; 37.6589° N, 25.7878 ° W; depth 600 m; 18 Oct. 2018; grab in coral rubble; M151- GeoB23173 ; SaM • 2 shells; 37.6587° N, 25.7886° W; depth 599 m; 19 Oct. 2018; box core in coral rubble; M151-GeoB23181 ; SaM .

AZORES , JOSÉ GASPAR SEAMOUNT • 1 shell; 37.6754° N, 25.7167° W; depth 309 m; 12 Oct. 2018; box core in coral rubble; M151-GeoB23130 ; SaM .

AZORES , AÇOR BANK • 1 shell; 38.3587° N, 29.0505° W; depth 648 m; 13 Oct. 2018; box core in bioclastic sand; M151-GeoB23135 ; SaM .

Remarks

Talassia tenuisculpta was described from off Madeira; a syntype is shown by Warén & Bouchet (1988: fig. 44; National Museum of Wales). Four additional syntypes are in BMNH (reg. 1875.5.27.29, not seen). The species is distributed from the Bay of Biscay to Madeira, the Azorean Seamounts and Islands and in the western Mediterranean Sea in 21–948 m ( Segers et al. 2009; this study). The outline of the shell is more slender ( Fig. 8 ) than that of T. coriacea ( Fig. 1 ) and the teleoconch is smooth with numerous growth lines and very fine dotted spiral lines ( Figs 8, 11 ).

Figures

Figs 1–11. Talassia Warén & Bouchet, 1988 from the NE Atlantic. 1–3. Talassia coriacea (Manzoni, 1868), off Funchal, Madeira, depth 70 m (SaM74968). 1. Ventral view, H = 2.7, W = 1.5 mm, Ha = 1.2 mm. 2. Protoconch, Wp = 0.37 mm. 3. Sculpture body whorl. 4–7. Talassia dagueneti (de Folin, 1873), Porcupine Seabight, Galway Mound, POS316-524 (SaM). 4–5. Side view, H = 2.5 mm. 5. Protoconch, Wp = 0.32 mm. 6–7. Ventral view, H = 2.3 mm, W = 1.0 mm. 7. Sculpture body whorl. 8–11. Talassia tenuisculpta (R.B. Watson, 1873), Azores, Mar da Prata, M151-GeoB23111 (SaM). 8–10. Ventral view, H = 2.6 mm, W = 1.3 mm. 9–10. Protoconch, Wp 0.40 mm, arrow indicates lip. 11. Side view, H = 2.3 mm. Scale bars = 0.2 mm.