Species
Inversella (Inversella) perundosa Öpik, 1939
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Strophomenata |
| Order | Strophomenida |
| Superfamily | Plectambonitoidea |
| Family | Taffiidae |
| Subfamily | Ahtiellinae |
| Genus | Inversella |
| Subgenus | (Inversella) |
| Species | angulata |
| borealis | |
| perundosa |