Genus
Tetractocrinus Jaekel, 1918
Selection of related publications
Arendt, Yu. A. 1976. Ordovikskie iglokožie gemistreptokrinoidei. Bulletin of the Moscow Society of Naturalists. Geological series 51, 2, 63-84.
List of species
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Echinodermata |
| Subphylum | Pelmatozoa |
| Class | Crinoidea |
| Order | Hemistreptocrinida |
| Family | Hemistreptocrinidae |
| Genus | Hemistreptocrinus |
| Nonparactocrinus | |
| Parorthocrinus | |
| Tetractocrinus | |
| Species | compactus |
References based on distribution
- Arendt, 1976 Lower Ordovician