Order TETRADIIDA, Middle, Upper Ordovician. Colony consists of tiny prismatic corallites, Four platy laminae extend fro the corallite wall to the axis. They have axial and quadripartite increase. Septa and pores are missing, tabulae are complete and broadly spaced. The order belongs to ALGAE Rhodophyta nowadays.
Order
Tetradiida Okulitch, 1936
Order TETRADIIDA
Taxon overview
Selection of related publications
Klaamann, E. R. 1966. The incommunicate tabulata of Estonia. ENSV TA Geoloogia Instituudi uurimused 1-97. Eesti NSV TA Geoloogia Instituut.
List of species
1. Rhabdotetradium frutex Klaamann, 1966 | Porkuni Stage
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Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Cnidaria |
| Class | Anthozoa |
| Subclass | Tabulata |
| Superorder | Heliolitoidea |
| Order | Auloporida |
| Favositida | |
| Halysitida | |
| Sarcinulida | |
| Tetradiida | |
| Family | Tetradiidae |
See also