Order
Dithecoidea Obut, 1960
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Hemichordata |
| Class | Pterobranchia |
| Subclass | Graptolithina |
| Superorder | Graptovermida |
| Order | Camaroidea |
| Crustoidea | |
| Dendroidea | |
| Dithecoidea | |
| Graptoloidea | |
| Inocaulida | |
| Mastigograptida | |
| Rhabdopleuridae | |
| Suborder | Sinograptina |
| Family | Cyclograptidae |
| Cysticamaridae | |
| Dithecodendridae | |
| Thamnograptidae | |
| Tubidendridae | |
| Wimanicrustidae | |
| Genus | Calyxhydra |
| Diplohydra | |
| Flexihydra | |
| Lagenohydra | |
| Neolagarograptus | |
| Palaeokylix | |
| Phragmohydra | |
| Podoliagraptus |