Lioglyphostoma rusum is an extinct species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.

(Original description) The small, slender shell is smoothly rounded, fusiform in the apertural view, the maximum diameter falling in front of the median horizontal.

The initial whorl is minute, almost entirely submerged, the succeeding volutions feebly inflated, increasing rather rapidly in altitude and diameter.

The dividing line between the spire and the protoconch is indicated by an irregular thickening of the shell, the appression of the posterior portion of the whorl, and the initiation of the axial and spiral ornamentation.

The posterior margin is closely appressed, feebly elevated, beveled, and spirally striated like the rest of the fasciole.