Clathromangelia granum (Philippi, 1844)
Eastern and central Mediterranean.
Predator in the circalittoral, on detritic and muddy bottoms, and in caves. Basionym: Pleurotoma granum.
Synonyms: cancellata, rudis…
 
« Testa minuta oblonga; costellis longitudinalibus circa 9, lineisque elevatis transversis (3 in anfr. superioribus) grosse clathrata; apertura oblonga, spiram aequante; labro incrassato, intus crenato. » – R. A. Philippi: Enumeratio molluscorum Siciliae vol. II, Berlin 1844, p.170.

The species in Philippi, plate XI.
Protoconch multispiral, radially striated, with some spiral microscultpure. Two keels appear during the transition protoconch - teleoconch; they will become the two spiral ribs of the first teleoconch whorl.

35m deep, Cristo del Circeo, San Felice, Lazio, W. Italy. 3,6mm. Original pictures provided by A. Nappo (IT).
– (CC BY-NC-SA) –
Colour variation.
44-50m deep, Scilla, Calabria, SW. Italy. 5-6,5mm.
Same spot. 3,7mm. Nota bene that the epithet quadrillum, previously used, is reserved for a Miocene fossil.
55m deep, Ognina, Catania, E. Sicily. 6,2mm.
Same spot. 5,9-6,4mm.

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