« Close to the previous one [ triplicata Brocchi 1814, fossil], from which it can be called a bicarenated variant. However, it differs by its advantageous stature and for the two keels that constantly surround its whorls. I owe the figured copy to Mr. Donati. Other specimens show a more acute apex. »

Other synonym: triplicata Philippi, who writes: « Shell delicately striated transversely, whith flattened whorls, [each one adorned with] three distinct, blunted keels, the median one being the stronger, the lower one obsolete. Variant β duplicata, the upper keel obsolete. » – R. A. Philippi: Enumeratio molluscorum Siciliae vol.I, Berlin 1836, p.190.