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Hydroida

Hydroida

Hydroida is an obsolete cnidarian order which united such animals as hydras, hydromedusae, and many marine attached hydroids. However, the group is paraphyletic and not composed from close relatives. But for the largest part, this group makes up what today is usually considered the subclass Leptolinae (or Hydroidolina) which also includes the colonial jellies of the Siphonophora which were not part of the Hydroida.

The "hydroid" cnidarians typically which grow up into large, elegantly branched forms. All the zooids of a colony are asexually produced from one parent zooid.

Examples of "hydroids" are:
*"Craspedacusta sowerbyi", the freshwater "jellyfish"
*"Hydra"
*Air ferns, novelty "plants" and aquarium ornaments.
*"Obelia"
*"Aequorea victoria" of the suborder Leptomedusae, the crystal jelly- a bioluminescent jellyfish.


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  • Hydroida — Hydroidea Hy*droi de*a, n. pl. [NL. See {Hydra}, and { oid}.] (Zo[ o]l.) An extensive order of Hydrozoa or Acaleph[ae]. [Written also {Hydroida}.] [1913 Webster] Note: This order includes the hydras and the free swimming hydromedus[ae], together… …   The Collaborative International Dictionary of English

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  • Leptolinae — NOTOC Taxobox name = Leptolinae image width = 200px image caption = Siphonophorae from Ernst Haeckel s 1904 Kunstformen der Natur regnum = Animalia subregnum = Eumetazoa phylum = Cnidaria subphylum = Medusozoa classis = Hydrozoa subclassis =… …   Wikipedia

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  • Hydraire — Hydrozoa Cet article est une ébauche concernant les cnidaires. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants …   Wikipédia en Français

  • Hydrozoa — Cet article est une ébauche concernant les cnidaires. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants …   Wikipédia en Français

  • Hydrozoaire — Hydrozoa Cet article est une ébauche concernant les cnidaires. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants …   Wikipédia en Français

  • Hydrozoaires — Hydrozoa Cet article est une ébauche concernant les cnidaires. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants …   Wikipédia en Français

  • Aequorea victoria — Saltar a navegación, búsqueda ? Aequorea victoria …   Wikipedia Español