Longchaeus insularum is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Longchaeus insularum Wikipedia
The shell has a yellowish color, banded and spotted with chestnut, with fine longitudinal white raised strigations, appearing like low rounded riblets, with occasional darker macillations, especially on the base. The whorls of the teleoconch are flattened. The suture and periphery are channeled. The aperture is channeled at the base. The columella is straight, three plaited. The length of the shell is 15 mm.
This species occurs in the Pacific Ocean off Hawaii.