Borsonella hooveri

Borsonella hooveri is an extinct species of sea snail, a marine gastropod mollusk in the family Borsoniidae.

The general form of the shell is biconic with a single sharp keel at the shoulder, between which and the suture the whorl is more or less excavated.

The suture is distinct, the margin in front of it is turgid, giving an effect as if minutely channelled.

The surface in front of the keel is moderately convex, spirally sculptured by obsolete distant lines crossed by fine irregular slightly elevated incremental lines, which, in spots, produce a vermiculate aspect.

The columella is straight, moderately callous, with a single strong almost horizontal plait near its insertion, anteriorly obliquely truncate, twisted, not pervious.