Cerithium scabridum Philippi, 1848
Lessepsian migrant. Persian Gulf and Red Sea to central Mediterranean (Sicilia, Tunisia, Adriatic). On muddy substrates, rock pools, lagoons and harbours, from intertidal grounds down to a few metres deep. Grazer and detritus feeder. In Mediterranean, the species can be invasive.
Tide pool, Ayía Nápa, E. Cyprus. 15mm.
Above and below: specimens collected on rocks at 2m deep, Saline Joniche, S. Calabria, SW. Italy. 13-14mm.
Synonyms: adenense, levantinum, nigropunctatum
 
« Testa parva, turrita, granosa, albida, fusco punctata; granis per series tres transversas dispositis, saepe alternatim fuscis, in anfra. ultimo septemserialibus; interstitiis transversim sulcatis; costis nonnullis irregularibus variciformibus hinc inde; apertura ovata; labio superius callo transverso munito; canali brevi. » – R. A. Philippi: “Testaceorum novorum centuria”, Zeitschrift für Malakozoologie vol. V, Hannover 1848, page23.
Cerithium scabridum in R. A. Philippi: Abbildungen und beschreibungen neuer oder wenig gekannter conchylien…, vol. III, Cassel 1851, fig.12 of the Cerithiidae.
 
« Shell small, conical, slightly short; spire rather elevated, acuminate, with a rectilinear outline; whorls 10, barely convex; last whorl taking a little less than the third of the total height; test quite thin, adorned by narrow decurrent regular cords, two in the upper whorls and four to five in the last one, bearing small rounded nipples, regular, prominent, spaced, reduced only at the base of the last whorl; colour: light fawn or greysish, the nipples clearly visible in white or in black. » – A. Locard: Les cerithium et les cerithidae des mers d’Europe, Lyon 1902, via BHL.
A tall and slender specimen from E. Adriatic: 5m deep, Cavtat, Konavle, Dubrovnik-Neretva Comitat, S. Croatia. 20mm.
Original pictures provided by N. Lete (HR).
(CC BY-NC-SA)
Shape and sculpture variation.
Shallow water, Shavei Zion beach, south of Nahariya, NW. Israel. 14,9-15,4mm.
Colour and pattern variation.
8m deep, Bodrum area, Muğla Province, SW. Turkey.
Average size: 5,5mm.
Variation at Gozo, Malta.
Original pictures provided by A. Nappo (IT).
(CC BY-NC-SA)
1m deep, on sand with algae, La Manga, Mar Menor side, Murcia, SE. Spain. 19,2mm.

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