Glyphostoma rugosum is a species of sea snail, a marine gastropod mollusc in the family Clathurellidae.
The outer lip is thickened and toothed. The anal sinus is large and rather deep. The color of the shell is whitish, with a chestnut band at the suture, obscurely indicated on the middle of the body whorl. The length of the shell is 6.5 mm.[1]
This species occurs in the Pacific Ocean along Madagascar.