Eucyclotoma tricarinata is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

Besides a two-whorled mucronate protoconch there are about seven whorls which wind obliquely and are girt with solid projecting keels.

Close set perpendicular riblets bead the keels at the point of intersection, and their interstices are again traversed by smaller spiral threads.

Aperture : the outer lip is flared, its edge dentate by the girdle ends, and roughened by intermediate wrinkles.

[2] This marine species occurs off Taiwan, Japan, the Philippines, Fiji, Queensland, Australia.