Genus
Pycnactis Ryder, 1926
Selection of related publications
Fedorowski, J., Gorianov, V. B. 1973. Redescription of teracorals described by E. Eichwald in "Palaeontology of Russia". Acta Palaeontologica Polonica 18, 1, 3-70.
Dybowski, W. N. 1874. Monographie der Zoantharia sclerodermata rugosa aus der Silurformation Estlands, Nord-Livlands und der Insel Gotland (Fortsetzung). Archiv für die Naturkunde Liv-, Ehst- und Kurlands 5, 4, 415-531. Druck von Heinr. Laakmann.
List of species
1. Pycnactis mitratus (Schlotheim, 1820) | upper Silurian
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Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Cnidaria |
| Subphylum | Anthozoa |
| Subclass | Rugosa |
| Order | Stauriida |
| Suborder | Lycophyllina |
| Family | Lykophyllidae |
| Genus | Desmophyllum |
| Hercophyllum | |
| Holophragma | |
| Neocystiphyllum | |
| Onychophyllum | |
| Phaulactis | |
| Plasmophyllum | |
| Pycnactis | |
| Species | mitratus |
| Genus | Rukhinia |
| Sverigophyllum |