Jujubinus unidentatus (Philippi, 1844)
Gulf of Gabes, Tunisia, to southern Sardinia, to Sicilia, to western Greece. Grazer and deposit feeder in the infralittoral, in Posidonia fields. Basionym: Trochus unidentatus.
Synonyms: africanus, venosus…
Big columellar tooth. The pattern is specific.
1m deep, in Posidonia meadow, gulf of Gabes. 9mm.
Trochus unidentatus in P. Fischer: Spécies général et iconographie des coquilles vivantes vol. XII, Paris 1880, pl. 91.
 
« This species is very common in the Gulf of Gabes. It is rather variable: the whorls are sometimes flat, sometimes depressed upwardly; the colouration is made up of black longitudinal lines, sometimes numerous and thin, sometimes large and widely spaced. » – Ph. Dautzenberg: ‘Liste des coquilles du Golfe de Gabès’, Journal de conchyyliologie vol. XXXI, Paris 1883, p.307.
A specimen from Jerba island. 11mm.
Original pictures provided by S. Clanzig (FR) – (CC BY-NC-SA).
30m deep, Poetto, Cagliari, S. Sardinia. 8,5mm.

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