C. imperialis robinsona Burch, 1954 (Robinson's volute, southern Philippines)[4]
Description
Shells of Cymbiola imperialis can reach a size of 70โ250 millimetres (2.8โ9.8 in).[5] These large and glossy shells are elongate and fusiform, light to heavy in weight. The basic color is whitish. The spire is high, with canaliculate sutures, strong red-brown axial ribs and narrow red-brown spiral lines. The aperture is whitish, elongate-ovate, with the outer lip showing many black denticles. The operculum is dark brown, thick and small.[6]