Tropaeas subulata is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.[1]
The whitish, somewhat shining shell is smooth and pellucid. The length of the shell is 9.5 mm. Its apex is mucronate. The whorls of the teleoconch are plano-convex, strongly longitudinally costate, and with punctate interstices. The columella is uniplicate in the middle. The aperture is produced and subchanneled below. The shell is umbilicated.[2]
This marine species occurs in the Red Sea, off the Philippines and off Japan.