Genus
Dyadograptus Obut, 1960
Aiheeseen liittyvät julkaisut
Obut, A. M. 1960. Correlation of some parts of Estonian Ordovician and Silurian deposits according to graptolites. ENSV TA Geoloogia Instituudi Uurimused V, 143-157.
List of species
1. Dyadograptus praecursor Obut, 1960 | Lasnamägi Stage
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Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Hemichordata |
| Class | Pterobranchia |
| Subclass | Graptolithina |
| Family | Cyclograptidae |
| Genus | Calycotubus |
| Conitubus | |
| Cyclograptus | |
| Dendrotubus | |
| Discograptus | |
| Dyadograptus | |
| Species | praecursor |
| Genus | Galeograptus |
| Kozlowskitubus | |
| Multitubus | |
| Parvitubus | |
| Reticulograptus |