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Hydrozoa

Definition: A class in the phylum CNIDARIA which alternates between polyp and medusa forms during their life cycle. There are over 2700 species in five orders.
Notes: do not confuse X ref LIRIOPE TETRAPHYLLA with LIRIOPE PLANT
Also Called: Liriope tetraphylla,Physalia,Portuguese Man-of-War
Previously Indexed: Cnidaria (1986-2002)

Hydrozoa Categories.
Hydra - A genus of freshwater polyps in the family Hydridae, order Hydroida, class HYDROZOA. They are of special interest because of their complex organization and because their adult organization corresponds roughly to the gastrula of higher animals.

Hydrozoa Definitions and Terms

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