Type species: Haplocephalopora uniceps Lang, 1916
This genus includes the species:
| Martha, Sanner, Cheetham & Scholz, 2025 | Paleogene Paleocene Thanetian | USA New Jersey | WoRMS 1825719 | |
| (Gabb & Horn, 1862) | Paleogene Paleocene Thanetian | USA New Jersey | WoRMS 1825722 | |
| Haplocephalopora uniceps | Lang, 1916 | Paleogene Paleocene Danian | Denmark | WoRMS 1403569 |