The genus Trophon is well developed in the southern ocean and has its counterpart in Boreotrophon of Arctic and North Temperate seas. Typical Trophon has a large globose thin shell with prominent axial lamellae and a smooth paucispiral asymmetrical protoconch. The radula consists of a central tooth with an L-shaped lateral on each side. The central tooth is broad and shallow with three main cusps and two intermediates. Operculum horny, ovate with a terminal nucleus.