Family
Ptilograptidae Hopkinson, 1875
Selection of related publications
Obut, A., Rytzk, G. 1958. Ordovician and Silurian Dendroidea of Estonia.  ENSV TA Geoloogia Instituudi Uurimused   III,      125-143.
List of species
1. Ptilograptus pennatus Obut et Rytsk, 1958 | Pirgu Stage
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Hemichordata | 
| Class | Pterobranchia | 
| Subclass | Graptolithina | 
| Order | Dendroidea | 
| Family | Acanthograptidae | 
| Dendrograptidae | |
| Polygonograptidae | |
| Ptilograptidae | |
| Genus | Ptilograptus |