Species
Pycnolithus bifidus Lindström, 1899
Synonymy list
1899     Pycnolithus bifidus n. sp — Lindström , pp. 105, fig. 11:5-9
1981     Pycnolithus bifidus Lindström, 1899 — Hill , pp. F623, fig. 412:2a-c
Selection of related publications
Bondarenko, O. B. 1992. Sistema geliolitoidei [The system of heliolitoids]. pp. 1-205.  Moskovskoe Obŝestvo Ispytateli Prirody. 
Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Cnidaria | 
| Subphylum | Anthozoa | 
| Subclass | Tabulata | 
| Superorder | Heliolitoidea | 
| Suborder | Heliolitina | 
| Superfamily | Coccoseridicae | 
| Family | Pycnolithidae | 
| Genus | Pycnolithus | 
| Species | bifidus | 
References based on distribution
- Bondarenko, 1992 Gotland lower Silurian