Subfamily
Orthograptinae Mitchell, 1987
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Hemichordata |
| Class | Pterobranchia |
| Subclass | Graptolithina |
| Order | Graptoloidea |
| Suborder | Axonophora |
| Infraorder | Diplograptina |
| Neograptina | |
| Superfamily | Retiolitoidea |
| Family | Climacograptidae |
| Dicranograptidae | |
| Lasiograptidae | |
| Monograptidae | |
| Subfamily | Orthograptinae |