Manzonia crassa ( Kanmacher, 1798 )

Oliver, Joan Daniel, Gofas, Serge, Urgorri, Victoriano, Díaz-Agras, Guillermo & Templado, José, 2022, Rissoidae gastropods of the outer continental shelf and slope off Galicia (NW Spain), Zootaxa 5196 (1), pp. 1-45 : 36

Manzonia crassa ( Kanmacher, 1798)

( Fig. 21g )

Material examined. (3 empty shells, in 2 samples): SPAIN • 2 sh; 42° 30.391′ N, 009° 19.517′ W to 42° 29.428′ N, 009° 17.924′ W; 147–148 m; 17–28 SeP. 2004; VERTIDOS AG-EBS-150 • 1 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 .

Remarks. As in the previous species, Manzonia crassa is very common in sublittoral bottoms from the British Islands to Morocco (not present on the Macaronesian islands) and throughout the Mediterranean ( Gofas & Oliver, 2011). Three eroded shells ( Fig. 21g ) have been found in two of the samples likely swept by the currents away from the coast.

Figures

FIGURE 21. Pusillina cf. radiata (Philippi, 1836). a–b Juvenile eroded shells (a: 1.6 mm; b: 1.7 mm) (SE:DRN-7); c Protoconch (VE:GA-AT-800); d Alvania cancellata (Da Costa, 1778) (0.96 mm) (VE:AG-EBS-150); e Crisilla semistriata (Montagu, 1808) (1.9 mm) (SE-08:EBS14); f Onoba semicostata (Montagu, 1803) (1.7 mm) (SA:SARRI-3); g Manzonia crassa (Kanmacher, 1798) (2.1 mm) (SE:DRN7).