| Pinna rudis Linnaeus, 1758 |
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Azores to Santa Helena, to western Mediterranean. Possibly in western Ireland, if it is not confused with Atrina fragilis Pennant. Attached in crevices and hollows on rocky bottoms, intertidal to 60m deep. Also living in the muddy fields of the Grande Vasière, at 100-125m deep, off W. France, where it is decimated by scampi dredgings. Said to live also in Caribbean, but this may be due to a confusion with Pinna carnea Gmelin.
Above and below: found in old nets, Ceuta harbour, spanish sovereignty in northern Morocco. 285mm. |
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Synonyms: ferruginosa, mucronata, pernula, varicosa…
Rare in Gibraltar & Alborán areas. |
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| Dead shell from Kaloí Liménes, Phaistós dímos, S. Crete. 225mm. |
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3m deep, among Posidonias, Préveza, Epirus, NW. Greece. Original picture provided by G. Bazios (GR).
– (CC BY-NC-SA) – |
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| Dead shell dredged in Messina Strait. 275mm. |
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| Young specimen in shallow water, Baia verde, Cannizzaro, Catania, E. Sicilia. Original picture provided by L. Orselli for iNaturalist – (CC BY-NC). |
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10m deep, Faial island, Azores. 175m.
Pinna rudis has less radial ribs than nobilis; these ribs are often markedly smaller than their interspaces; the scales are fewer, larger, tubular or spatulate. |
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| 3-6m deep, attached by byssus in rock fissures with sand, live reef area, Tarrafal, Santiago island, Cabo Verde archipelago. 100mm. |
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| An other specimen from the archipelago. In crevice at 20m, Baia das Gatas, São Vicente. 140mm. |
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| The siphons in a specimen from Ceuta. Original picture provided by enriqueov for iNaturalist – (CC BY-NC). |
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| Pinna rudis (obviously an Atrina fragilis) and Pinna mucronata (syn. of rudis Lin.) in G. Poli: Testacea utriusque siciliae… t. IV Atlas, Parma 1791-1796, via BHL. |
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| Pinna pernula in J. G. Hidalgo: Moluscos marinos de España, Portugal y las Baleares, Madrid 1870, via BHL. |
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| Off Playa Chica, Puerto del Carmen, southern coast of Lanzarote, Canarias. Original picture provided by M. Schouten for iNaturalist – (CC BY-NC). |