Hemisurcula is an extinct genus of sea snails, marine gastropod mollusks in the family Clavatulidae.

[1] (Original description) In this genus the shell is fusiform, with the protoconch conoidal, multispiral and closely coiled.

The nepionic (= relating to the stage of development succeeding the embryonic) spire whorls alone are costate and have also an elevated collar below the suture.

The type of this genus is PIeurotoma silicata, of Aldrich, a very remarkable and isolated species occurring in the Lignitic Eocene of the Gregg's Landing beds of Alabama.

The beaded subsutural collar, subjacent depression and swollen and finely ribbed lower parts of the two whorls immediately below the protoconch are lost completely on the larger whorls, though the subsutural collar can be feebly traced as a slightly tumid line gradually descending further below the suture with the growth of the shell.