Crepidula unguiformis Lamarck, 1822
Mediterranean and adjacent waters. Filter feeder in the infralittoral. Synonyms: calceolina, candida, pulchella…
20-25m deep, Golfo di Taranto, Puglia, S. Italy. 14mm.
Inside white.
In the harbour, Motril, Granada, Andalucia, S. Spain. 16mm.
« Frequentissima in mari Siculo, semper internae testarum faciei adhaerens, ita ut specimina 116 collegerim… » – R. A. Philippi: Enumeratio molluscorum Siciliae vol. I p.120. Notice the pattern on the apical area, and its sudden disappearing on the later stages of growth.

In dead H. trunculus at 1m, Águilas, Murcia, S. Spain. 7-12mm.
50m deep, Scilla, Reggio Calabria, SW. Italy. 15,5mm.
Crepidula fornicata and Cr. unguiformis in L. A. Reeve: Conchologia systematica vol. II, London 1842, plate CXLIII.
36m deep, in sediments, San Giovanni Li Cuti, Catania, E. Sicilia. 5-9,5mm.
Juveniles from 55m deep, Ognina area, Catania.
Two moulinsii, with the dorsal pattern showing through the shell on ventral view, and one unguiformis. 4,7-6,5mm.

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