Copulabyssia tenuis (Monterosato, 1880)

Iceland and Norway to Mediterranean. On low circalittoral bottoms (100m) down to continental shelf and slope (1778m), fixed on sunken organic substrates (wood, whale falls). Microbial grazer. Eyeless. Original taxon: Propilidium tenue. Synonym: corrugata. 250m deep, Elba island, Toscana, W. Italy. 2mm.

Cocculina corrugata in J. G. Jeffreys: “On the Mollusca procured during the cruise of H.M.S. Triton”, Proceedings of the Zoological Society of London, year 1883, plate XLIV fig.2.   « Shell oval, convex, but somewhat depressed, thin, opaque, and lustreless. Sculpture: regular, fine, and close-set concentric striae or wrinkles, which are chiefly observable and stronger round the margin, especially in front or at the broader end. Colour: chalky-white, except at the margin, which is yellowish-brown. Beak small, incurved and slightly twisted to one side; the spire has a single whorl; the beak is placed close to the hinder margin, and nearly overlaps it. Mouth oval. Inside smooth. No septum. »

Trawled off Gioia Tauro, Reggio Calabria, SW. Italy. 1mm.

200m deep, Dubrovnik, S. Croatia. 1,7mm. Original pictures provided by R. Stanić (HR) – (CC BY-NC-SA).

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