perekond
Peiragraptus Strachan, 1954
Klassifikatsioon
| organismirühm | Biota |
| domeen | Eukaryota |
| riik | Animalia |
| hõimkond | Hemichordata |
| klass | Pterobranchia |
| alamklass | Graptolithina |
| selts | Graptoloidea |
| alamselts | Axonophora |
| infraselts | Diplograptina |
| alamsugukond | Peiragraptinae |
| perekond | Amplexograptus |
| Anticostia | |
| Eoglyptograptus | |
| Geniculograptus | |
| Hustedograptus | |
| Orthograptus | |
| Paraorthograptus | |
| Pararetiograptus | |
| Peiragraptus | |
| Rectograptus |