Thapsia is a genus of air-breathing land snails, terrestrial pulmonate gastropod molluscs in the subfamily Sheldoniinae of the family Urocyclidae.

[2] Species in this genus are found in tropical western Africa, from Senegal to Gabon.

Species attributed to the genus Thapsia sensu lato have shell diameters ranging from about 15 to 30 mm, with 5½-6½ whorls.

These rather featureless dextral shells are characterized by a low spire and their yellow to brown color.

Thapsia was originally designated in 1860 by German zoologist Johann Christian Albers as a subgenus of Nanina Gray, 1834, non Risso, 1826.