Type species: Hemistylus virgula Voigt, 1928
This genus includes the species:
| Voigt, 1987 | Tertiary (L. Pal.) | Belgium | WoRMS 1403680 | |
| Martha, Sanner, Cheetham & Scholz, 2025 | Paleogene Paleocene Thanetian | USA New Jersey | WoRMS 1823542 | |
| Voigt, 1928 | Cretaceous | Germany | WoRMS 1403681 |