British Isles to Morocco, Azores, Madeira and lusitanian seamounts to Mediterranean. Grazer and deposit feeder in the infralittoral down to about 60-100m deep, possibly deeper. It is often found in Posidonia meadows.
Basionym: Trochus exasperatus.
Synonyms: corallinus, igneus.
On Posidonia leaves, La Madrague de Montredon, south of Marseille, Provence, S. France. Original picture provided by S. Le Bris for iNaturalist – (CC BY-NC).
Shell relatively large for the genus. The protoconch and the very first teleoconch whorls are red to pinkish; the remaining whorls bear an alternance of white and red-coralline to brownish blotches more or less radially arranged.
2m deep, on broken shells and stones, Mijas, Málaga, Andalucia, S. Spain. 11mm.
“Exasperatus” means inflamed as well as rough. This specimen was collected in fish trap, on rocky bottom with algae, Armação de Pêra, Silves, Faro, Algarve, S. Portugal. 10mm. The sutural cords show here some prosocline folds.
