Hadroconus watsoni is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.

The axial sculpture consists of many protractively flexuous extremely fine lines with wider interspaces over all the whorls.

The cemented edges at the suture by their opacity look like a presutural band, but this is not reflected in the sculpture.

On the base there are about a dozen fine spiral grooves between the edge of the umbilicus and the periphery, a little coarser near the carina.

[3] This species occurs in the Atlantic Ocean off the coast of Georgia, USA.