Tribia coronata (Scacchi, 1835)
Sicily Channel to Corsica.
Predator in the low infralittoral down to 180m deep.
Original taxon: Cancellaria coronata. Synonym: taeniata.
A specimen from Siracusa, Sicily. 14mm.
Original pictures provided by M.T. Spanu (IT).
(CC BY-NC-SA)
« Shell small, elongated; its slender appearance is stressed by its pronounced axial ribs. […] Colour very pale brown, with lines of pale brown patches on the axial ribs: dark brown blotches on the sutural area between the axial ribs. The spiral lines are whitish. Protoconch very pale brown, relatively large, paucispiral […]. Teleoconch with four slightly rounded whorls; suture impressed, sutural ramp slightly sloping down outward. Axial sculpture starts abruptly at rim of protoconch; it consists of well defined ribs […] Spiral sculpture of rather vaguely indicated spiral ribs […]. The spirals are most prominent when crossing the axial ribs, especially on the younger whorls; they are only vaguely indicated in the area between the axials, where there is also a confuse axial growth-line pattern. Spiral cord near periphery is the most marked, but still not very conspicuous. » – A. Verhecken: “Revision of the Cancellariidae (Mollusca, Neogastropoda, Cancellarioidea) of the eastern Atlantic (40°N-40°S) and the Mediterranean”, Zoosystema vol. 29(2), june 2007, p.331-332.

Siracusa, 12mm.
Original pictures provided by A. Nappo (IT).
(CC BY-NC-SA)
« The upper part of the axial ribs surmounts the sutural ramp, crossing it obliquely as a wedge ending adapically in a lamella with a slightly concave profile. The shoulder of the axial ribs forms a soft coronation. Aperture rounded trapezoidal […], no parietal tooth, no inner lirae on outer lip which is slightly flared out. Columella straight, with two rather oblique brown folds near its middle, contrasting with the white columella. The white rim of the siphonal canal might be interpreted as a third columellar fold. Umbilicus completely closed by a very thin columellar callus. […] Lirations inside the outer lip of recent shells have also been reported… » – Ibid.

90m deep, off Filfla island, south of Malta. 16,2mm.
Original pictures provided by A. Nappo (IT).
(CC BY-NC-SA)
Siracusa, 65m deep, on muddy/debris seabed. 19mm.

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