Grazer and detritus feeder in the infralittoral and the circalittoral.
Original taxon: Valvata? striata.
Synonyms: carinulatus, costata, costulatus, striatula…
In eastern Spain, around Valencia, there is a keeled variant that can be called “tricarinatus”. See Oliver & Rolán, 2002.
Beach drift, Cap d’Agde, S. France. 2mm.
« Testa minima, subdiscoidea, supra convexiuscula, subtus umbilicata, transversim sulcato-striata; apertura orbiculari, valde obliqua. » – R. A. Philippi: Enumeratio molluscorum Siciliae vol. I, Berlin 1836, p.122. An excellent description is given by Locard in “Note sur les Espèces françaises appartenant au genre CIRCULUS”, Bulletins de la Société malacologique de France vol. VI, Paris 1889, p.293.
La Franqui, Leucate, Occitania, S. France. 2mm.
Original pictures provided by S. Clanzig (FR).
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