Sibogasyrinx pyramidalis is a species of sea snail, a marine gastropod mollusk in the family Cochlespiridae.

(Original description) The shell has a fusiform shape, with a strictly pyramidal spire and a rather long, slender siphonal canal.

The straight line only interrupted by a row of short, fold-like, oblique tubercles at the lower part of the whorls, somewhat fainter near the aperture.

The spiral sculpture consists of impressed striae, crossing the lower half of basal row of tubercles on each whorl, and 2 or 3 just above the suture.

The whole basal part of the body whorl is spirally striated or grooved, the upper part of the whorls is nearly smooth, but for a few scarcely visible spirals and fine and coarse flexuous growth-lines, becoming much coarser on the siphonal canal, which by the intercrossing of this sculpture is slightly granular.