Family
Dichograptidae Lapworth, 1873
Selection of related publications
Bergström, S. M., Löfgren, A., Maletz, J. 2004. The GSSP of the Second (Upper) Stage of the Lower Ordovician Series: Diabasbrottet at Hunneberg, Province of Västergötland, Southwestern Sweden. Episodes 27, 4, 265-272.
Kaljo, D. L., Kivimägi, E. K. 1976. Zonal stratigraphy of the Estonian Tremadocian. Graptolites and Stratigraphy, pp. 53-63. Academy of Sciences of Estonian SSR. Institut of Geology.
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. Clonograptus galgebergi (Monsen, 1937) | Ordovician
3. Clonograptus multiplex (Nicholson, 1868) | Lower Ordovician
4. Clonograptus sarmentosus (Moberg, 1892) | Tremadocian
5. Dichograptus octobrachiatus Hall, 1858 | Lower Ordovician
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Klassificering
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Hemichordata |
| Class | Pterobranchia |
| Subclass | Graptolithina |
| Order | Graptoloidea |
| Suborder | Dichograptina |
| Family | Dichograptidae |
| Genus | Clonograptus |
| Dichograptus | |
| Herrmannograptus | |
| Holograptus | |
| Loganograptus | |
| Mimograptus | |
| Orthodichograptus | |
| Schizograptus | |
| Triaenograptus | |
| Family | Didymograptidae |
| Pterograptidae | |
| Genus | Calamograptus |