Spisula solida (Linnaeus, 1758)
Iceland & Norway to Morocco, Madeira to W. Alborán. On sand or grit, sometimes with a small part of silt, chiefly in the first meters of depth, down to 50m deep in the north, 160m deep in the south (DORIS).
Original taxon: Cardium solidum.
Synonyms: ovalis, striata, truncata
Trawled at 20-30m deep, Málaga, Andalucia, S. Spain. 35mm.
Mactra solida in Forbes & Hanley: A history of British Mollusca and their shells vol. IV, London 1853, via BHL.
Shell representing in form an isoceles triangle, convex, usually solid and thick, opaque, somewhat but not very glossy […] Numerous slight and irregular concentric striae, which often become laminar and almost rib-like in front and at the sides, and always at the dorsal margin ; lines of growth strongly marked. […] Habitat: in gravelly sand, at low tides and at the depth usually of only a few fathoms. – J. G. Jeffreys: British conchology vol. II, London 1863, via BHL.

Specimens from English Channel, collected on intertidal coarse sand, 150m off the pool, Bon Secours Beach, Saint-Malo, N. Brittany, NW. France. 32-34mm.

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