Genus
Sivorthis Jaanusson et Bassett, 1993
Selection of related publications
Öpik, A. 1930. Brachiopoda Protremata der estländischen ordovizischen Kukruse-Stufe. Tartu Ülikooli Geoloogia Instituudi Toimetused 20, 1-261.
List of species
1. Sivorthis filistera Jaanusson et Bassett, 1993 | Kukruse Stage
3. Sivorthis? freija (Õpik, 1930) | Kukruse Stage
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Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Orthida |
| Suborder | Orthidina |
| Superfamily | Orthoidea |
| Family | Orthidae |
| Genus | Eridorthis |
| Leoniorthis | |
| Orthambonites | |
| Orthis | |
| Paralenorthis | |
| Rogorthis | |
| Sivorthis | |
| Species | filistera |
| magna | |
| Sivorthis? freija | |
| Genus | Sulevorthis |
| Taphrorthis |
See also