Family
Sulcavitidae Syssoiev, 1958
Selection of related publications
Malinky, J. M. 2003. New Middle and Late Ordovician hyoliths from Estonia.  Journal of Paleontology   77,   2,   304-313. DOI:10.1017/S0022336000043651
Malinky, J. M. 2002. A revision of Early to Mid Ordovician Hyoliths from Sweden.  Palaeontology   45,   3,   511-555. DOI:10.1111/1475-4983.00248
List of species
1. Sulcavitus caelatus (Holm, 1893) | Kunda Stage
2. Tulenicornus oelandicus (Holm, 1893) | Middle Cambrian (old nomenclature)
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Mollusca | 
| Class | Hyolitha | 
| Order | Hyolithida | 
| Family | Amitidae | 
| Angusticornidae | |
| Carinolithidae | |
| Crispatellidae | |
| Hyolithidae | |
| Parentilitidae | |
| Slapylitidae | |
| Sulcavitidae | |
| Genus | Sulcavitus | 
| Tulenicornus | |
| Family | Tulenicornidae |