Species
Sivorthis magna Hansen, 2008
Synonyymit
2008 Sivorthis magna — Hansen , pp. 65-67, fig. pl. 9: 2-5; tabl. 37
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Orthida |
| Suborder | Orthidina |
| Superfamily | Orthoidea |
| Family | Orthidae |
| Genus | Sivorthis |
| Species | filistera |
| magna | |
| Sivorthis? freija |