Species
Petalolithus intermedius Bouček et Přibyl, 1941
Selection of related publications
Gailite, L. K., Rybnikova, M. V., Ulst, R. Ž. 1967. Stratigrafiâ, fauna i usloviâ obrazovaniâ silurijskih porod Srednej Pribaltiki. pp. 1-304.  Zinatne. 
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Hemichordata | 
| Class | Pterobranchia | 
| Subclass | Graptolithina | 
| Order | Graptoloidea | 
| Suborder | Axonophora | 
| Superfamily | Retiolitoidea | 
| Family | Retiolitidae | 
| Subfamily | Petalolithinae | 
| Genus | Petalolithus | 
| Species | dubovikovi | 
| folium | |
| intermedius | |
| minor | |
| ovatoelongatus | |
| praecedens | |
| praecursor | 
References based on distribution
- Gailite et al., 1967 Engure 4 borehole Llandovery
- Gailite et al., 1967 Remte 3 borehole Llandovery
- Gailite et al., 1967 Sturi puurauk Llandovery