| Rissoa auriscalpium (Linnaeus, 1758) |
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Mediterranean, especially in the western part.
Grazer and detritus feeder in the upper infralittoral.
Original taxon: Turbo auriscalpium (ear-loop).
A specimen from Sicily. 8mm.
Original pictures provided by G. Lindner (DE).
– (CC BY-NC-SA) – |
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Synonyms: acicula, elegans, pulchella…
One of the dominant mollusc species in Posidonia meadows. Above: 2-3m deep, in grit collected at the bottom of some depressions hollowed in the rocky substrate of a Posidonia meadow, Anse des Fossettes, at the root of the eastern peninsula, Saint-Jean-Cap-Ferrat, Alpes-Maritimes, SE. France. |
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| 8m deep, Bozcaada island, Çanakkale province, W. Marmara, NW. Turkey. 6-7mm. |
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| Juvenile, collected at 3-6m deep, offshore gardens made of small Posidonia
patches in rough sand pockets on granitic substract, Ghjunchitu Bay, Isola Rossa, NW. Corsica. 4,5mm. |
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Subadult (5,5mm) and adult (6,4mm).
Saint-Jean-Cap-Ferrat, Anse des Fossettes. |
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| Same spot. 5,9-6,4mm. |
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Gerontic (7mm) and adult (6,2mm) from the same spot.
The shell whitens while aging. |
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On a leaf of Posidonia oceanica, Costa Brava, E. Spain.
Original picture provided by J. Regàs (ES).
– (CC BY-NC-SA) – |
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| Fresh dead specimen collected at 8m deep, in grit among Posidonia meadows, west of Ghjunchitu bay. 6,3mm. |
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| A young one from 12m deep, Vignola bay, Marina di Davia, Corbara, NW. Corsica. 3,7mm. |
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| 8m deep, Bozcaada island. 5,1mm. |
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| Variations of shape and size in adults from a population of the Saronic Gulf, SE. Greece. 5,1-5,9-6,2-7,7mm. |
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Melanistic specimen from Menorca, Illes Balears, NE. Spain.
Original pictures provided by S. Marenco.
– (CC BY-NC-SA) – |