perekond
Phormograptus Whittington, 1955
Klassifikatsioon
| organismirühm | Biota |
| domeen | Eukaryota |
| riik | Animalia |
| hõimkond | Hemichordata |
| klass | Pterobranchia |
| alamklass | Graptolithina |
| selts | Graptoloidea |
| alamselts | Axonophora |
| sugukond | Lasiograptidae |
| perekond | Archiretiolites |
| Brevigraptus | |
| Hallograptus | |
| Lasiograptus | |
| Neurograptus | |
| Nymphograptus | |
| Orthoretiolites | |
| Paraplegmatograptus | |
| Phormograptus | |
| Pipiograptus | |
| Plegmatograptus | |
| Yinograptus |