Family
Cyrtendoceratidae Hyatt, 1900
Selection of related publications
Balashov, Z. G. 1968. Èndoceratoidei ordovika SSSR. pp. 1-277. Izdatel'stvo Leningradskogo Universiteta.
Foerste, A. F. 1932. The cephalopod genera Cyrtendoceras and Oelandoceras. The Ohio Journal of Science 32, 3, 163-172.
Holm, G. 1892. Om tvenne Gyroceras-formigt böjda Endoceras-arter. GFF 14, 2, 125-136. DOI:10.1080/11035899209444299
List of species
1. Cyclocyrtendoceras estoniense (Foerste, 1932) | Kunda Stage
2. Cyrtendoceras hircus (Holm, 1892) | Darriwilian
3. Cyrtendoceras remelei Foerste, 1932 | Darriwilian
4. Cyrtendoceras schmidti (Holm, 1892) | Darriwilian
5. Protocyclendoceras balticum Balashov, 1968 | Kunda Stage
6. Protocyclendoceras iruense Balashov, 1968 | Kunda Stage
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Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Orthoceratia |
| Order | Endoceratida |
| Family | Cyrtendoceratidae |
| Genus | Cyclocyrtendoceras |
| Cyrtendoceras | |
| Protocyclendoceras | |
| Family | Endoceratidae |
| Narthecoceratidae | |
| Proterocameroceratidae | |
| Genus | Cyclendoceras |