Organisms

Hydrozoa

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.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

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.

MeSH Record

Classification

Broader headings

Narrower headings

Related Concepts

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MeSH Record

Synonyms

16 entry terms
  • Hydrozoans
  • Hydrozoan
  • Hydrozoas
  • Liriope tetraphylla
  • Physalia
  • Physalia physalis
  • Portuguese Man-of-War
  • Liriope tetraphyllas
  • Man-of-War, Portuguese
  • Man-of-Wars, Portuguese
  • Physalia physali
  • Physalias
  • Portuguese Man of War
  • Portuguese Man-of-Wars
  • physali, Physalia
  • tetraphyllas, Liriope

MeSH Record

Aspects Covered

18 allowable subheadings

Indexed with the subheadings anatomy & histology, chemistry, classification, cytology, drug effects, embryology, enzymology, genetics, growth & development, immunology, metabolism, microbiology, parasitology, pathogenicity, physiology, radiation effects, ultrastructure, virology.

MeSH Record

Indexing Annotation

do not confuse entry term LIRIOPE TETRAPHYLLA with LIRIOPE PLANT

MeSH Record

History Note

2003; use HYDRA 1997-2000, use CNIDARIA 2001-2002; for PHYSALIA & PORTUGESE MAN-OF-WAR use CNIDARIA 1998-2002

MeSH Record

Previous Indexing

  • Cnidaria (1986-2002)

MeSH Hierarchy

Tree Number

  1. B01w.050w.500w.308w.485w

AMA Style

References

  1. National Library of Medicine. Hydrozoa. Medical Subject Headings (MeSH). 2026. Unique ID D037402. http://id.nlm.nih.gov/mesh/2026/D037402
  2. Hydrozoa. In: Wikipedia. https://en.wikipedia.org/wiki/Hydrozoa
  3. Hydrozoa. In: Wikidata. https://www.wikidata.org/wiki/Q181989