| Ctena decussata (O. G. Costa, 1830) |
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| W. France to Canarias, Mediterranean. Reported from SW. Great Britain. Sublittoral and shallow shelf. Original taxon: Lucina decussata. Synonyms: istriensis Coen, reticulata poli. 2m deep, on gravel under stones, western beach, Palaiohora, SW. Crete. 13,5-15,5mm. |
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| The hinge and the muscle scars in a specimen from Kepez, Çanakkale, SW. Marmara Region, NW. Turkey. 9,2mm. |
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| The largest comes from western Crete. 3m deep in sand, Elafonissi, Kissamos. 15mm. The smallest comes from Sénégal. 1-2m deep, on sand, N’Gor island, Dakar. 11,5mm. |
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| Juvenile from Port-Vendres, Occitania, S. France. 3,5mm. Original picture provided by A. Bertrand (FR) – CC BY-NC-SA. |
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| Young shell from 3m deep, Numana, Riviera del Conero, Ancona, Marche, NE. Italy. 8mm. Original pictures provided by A. Capici (IT) – CC BY-NC-SA. |
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| Weak sculpture on this specimen from low infralittoral, Almería, Andalucia, S. Spain. Width of each detail: 6mm. |
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