Type species: Helopora tenuis James, 1878
This genus includes the species:
Ulrich, 1890 | U. Ordovician | USA (Minnesota) | WoRMS 1399932 | |
(Ulrich, 1882) | U. Ordovician | USA (Kentucky) | WoRMS 1410021 | |
Ulrich, 1890 | U. Ordovician | USA, Greenland | WoRMS 1399933 | |
Grubbs, 1939 | Silurian | USA | WoRMS 1399934 | |
(James, 1878) | Ordovician | USA | WoRMS 1410022 |