Species
Orthograptus inopinatus Bouček, 1944
Classification
| Organism group | Biota |
| Domain | Eukaryota |
| Kingdom | Animalia |
| Phylum | Hemichordata |
| Class | Pterobranchia |
| Subclass | Graptolithina |
| Order | Graptoloidea |
| Suborder | Axonophora |
| Infraorder | Diplograptina |
| Subfamily | Peiragraptinae |
| Genus | Orthograptus |
| Species | acutus |
| aequalis | |
| calcaratus | |
| inopinatus | |
| mutabilis | |
| parovejensis | |
| pauperatus | |
| propinquus | |
| proprius | |
| quadrimucronatus | |
| stonishkensis | |
| whitfieldi |