| Acanthocardia echinata (Linnaeus, 1758) |
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| Iceland to Baltic, N. Norway to Canarias, Mediterranean. Intertidal to 300m deep. Original taxon: Cardium echinatum. Synonyms: bullatum, duregnei, flexuosum, hystrix, novum. 150m deep, off Motril, Granada, Andalucia, S. Spain. 44mm. |
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| The epithet mucronatum refers to the form that lives in Mediterranean. Rounder and more equilateral than atlantic specimens, its spines are spatulated. 80-100m deep, off Almería, Andalucia. 40-42mm. |
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| Trawled on muddy bottom, at 80-110m deep, off Roses, Girona, Catalunya, NE. Spain. 61mm. |
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| 60m deep, in the channel of Brač, Split-Dalmatia Comitat, S. Croatia. 43,4mm. Original pictures provided by R. Stanić (HR) – (CC BY-NC-SA). |
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| Lagos Bay, Algarve, S. Portugal. 53mm. |
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| Specimens from Atlantic have different spines, less spatulate than conical. White Bank, North Sea. 60mm. |
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| Young specimen from Saint-Quay-Portrieux, N. Brittany, NW. France. 35mm. |
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| Same spot, at low tide. 45mm. |
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| Impressive examples from northern Brittany: At extreme low tide, on sand banks, south of Erquy, Bay of Saint-Brieuc. 51-57mm. |
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| Gerontic. Beachstormed at extreme low tide, Les Rosaires, Plérin, St-Brieuc area, N. Brittany. 63mm. |
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| Same spot. Pattern variations. 58-60mm. |
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| Same spot. 49-55mm. |
| — back to Cardiidae — |