Tritia incrassata (Ström, 1768)

Iceland and Norway to Guinea, Madeira to Mediterranean and Black Sea. Scavenger in the infralittoral. Original taxon: Buccinum incrassatum. Synonyms: coccinella, delicata, minutum… 20m deep, Granada, Andalucia, S. Spain. 7,7mm.

Variants “minor”, “major”, “elongata”, “varicosa”… In sand at low tide, Yalta, Krimea, Black Sea. 7,3-8,4mm.

The species in Forbes & Hanley: A history of British Mollusca and their shells vol. I, London 1853, plate LL.

2-4m deep, Llançà, Girona, Catalunya, NE. Spain. 9-11mm.

In nets at 25-45m deep, Alger bay, Algeria. 13,5mm.

Above and below: Cap d’Agde, Hérault, Occitania, S. France. 10-13mm.

The spiral cords, crossing numerous costae, give this button appearance that could sometimes lead to misenditification on worn specimens.

Downslope transportation? 50m deep, bottom of coral and gorgonians, Scilla, Reggio Calabria, SW. Italy. 9m.

Live specimen on rock, Costa Brava, eastern Spain. Original picture provided by J. Regàs (ES). – (CC BY-NC-SA) –

Another specimen, hunting. Original picture provided by J. Regàs (ES). – (CC BY-NC-SA) –

Another one from Palavas-les-Flots, Hérault. Original picture provided by P. Girard for iNaturalist – (CC BY-NC).

In intertidal rock pool, on a small beach between Kilmory and Ockle, northern coast of the Àird nam Murchan, Lochaber District, W. Highland, Scotland.

A specimen resting on old eggs of Stramonita haemastoma (Linnaeus, 1767), on which it may feed. At low tide on rock, Cimadevilla peninsula, Gijón, Asturias, N. Spain. Original picture provided by A. Richter for iNaturalist – (CC BY-NC).

On the beach, atr the foot of the Monte dei Corvi, Ancona, Marche, NE. Italy. Sizes around 11mm. Original pictures provided by A. Capici (IT). – (CC BY-NC-SA) –

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