Classification
Organism group | Biota |
Kingdom | Animalia |
Phylum | Hemichordata |
Class | Pterobranchia |
Subclass | Graptolithina |
Order | Graptoloidea |
Suborder | Axonophora |
Family | Dicranograptidae |
Subfamily | Dicranograptinae |
Genus | Dicranograptus |
Species | irregularis |
spinifer |