Type species: Calvina kalloensis Willems, 1972
This genus includes the species:
Willems, 1972 | Oligocene | Belgium | WoRMS 1400493 | |
(Keij, 1972) | Paleogene Eocene Lutetian-Bartonian | India | WoRMS 1410308 | |
Bielokrys, 1995 | Paleogene Eocene | Ukraine | WoRMS 1400494 | |
(Keij, 1972) | Paleogene Oligocene Rupelian | France | WoRMS 1410309 | |
(Håkansson & Jürgensen , 1987) | Paleogene Paleocene | Greenland | WoRMS 1410310 |