Orchistoma
Orchistoma is a genus of hydrozoans in the order Leptothecata. It is the only genus in the monotypic family Orchistomatidae.
The species of this genus are found in Europe, North America and Australia.
Species:
- Orchistoma agariciforme
- Orchistoma collapsum
- Orchistoma manam
- Orchistoma mauropoda
- Orchistoma nubiae
- ''Orchistoma pileus''