Family
Pycnolithidae Lindström, 1899
Selection of related publications
Bondarenko, O. B. 1992. Sistema geliolitoidei [The system of heliolitoids]. pp. 1-205. Moskovskoe Obŝestvo Ispytateli Prirody.
List of species
1. Pycnolithus bifidus Lindström, 1899 | lower Silurian
Klassificering
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Cnidaria |
| Subphylum | Anthozoa |
| Subclass | Tabulata |
| Superorder | Heliolitoidea |
| Suborder | Heliolitina |
| Superfamily | Coccoseridicae |
| Family | Coccoserididae |
| Palaeoporitidae | |
| Pycnolithidae | |
| Genus | Pycnolithus |
| Pragnellia | |
| Urceopora |