Clionella bornii is a species of sea snail, a marine gastropod mollusk in the family Clavatulidae.

(Freely translated from the original Latin description) The whitish shell is elongated and subturrited.

The spiral striae show obsolete grooves and are best seen on the early whorls.

It differs, however, in being covered with a paler epidermis, in having below the suture a raised girdle formed by a depression or constriction around the whorls, and also in the style of coloration.

This marine species occurs between Jeffrey's Bay and East London, South Africa