Inodrillia amblytera is a species of sea snail, a marine gastropod mollusk in the family Horaiclavidae.

(Original description) The shell consists of eight whorls, rather thick, of a light yellow color, sometimes banded with reddish brown.

The posterior sinus is nearly round, situated just below the suture, and has, in the best developed specimen, a thin, sharp edge rising a little above the surface of the shell, bending decidedly backward, then curving and nearly meeting in front.

The outer lip rounds gradually to near the anterior end of the aperture, where it is slightly contracted, making a short, broad siphonal canal, then twisting abruptly backward produces a decided notch before joining the columella.

Microscopic striae intersect the fine lines of growth, giving to the entire surface of the shell a peculiar crinkled appearance.