Hydrozoa
Order

Hydroida Johnston, 1836

https://files.geocollections.info/large/a4/76/a476a3a5-2ff3-444c-a318-782738728ff0.jpg
Selection of related publications
Mierzejewski, P. 1986. Ultrastructure, taxonomy and affinities of some Ordovician and Silurian organic microfossils. Palaeontologia Polonica 47, 129-220.
Classification
Organism groupBiota
KingdomAnimalia
PhylumCnidaria
ClassHydrozoa
OrderHydroida
SuborderAthecata
Thecapora