Zooid: Difference between revisions
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actually the living one is more appropriate than just the tunic |
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{{distinguish|zoid (disambiguation){{!}}zoid}} |
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[[File:Pyrosoma atlanticum |
[[File:Pyrosoma atlanticum.JPG|thumb|''[[Pyrosoma atlanticum]]'', a [[tunicate]], is a colony of zooids]] |
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A '''zooid''' or '''zoöid''' {{IPAc-en|ˈ|z|oʊ|.|ɔɪ|d}} is a single [[animal]] that is part of a [[colony (biology)|colonial]] animal. This lifestyle has been adopted by animals from separate unrelated taxa. Zooids are [[multicellular]]; their structure is similar to that of other solitary animals. The zooids can either be directly connected by tissue (e.g. [[coral]]s, [[Catenulida]], [[Siphonophorae]], [[Pyrosome]] or [[Ectoprocta]]) or share a common exoskeleton (e.g. [[Bryozoa]] or [[Pterobranchia]]). The colonial organism as a whole is called a ''zoon'' {{IPAc-en|ˈ|z|oʊ|.|ɒ|n}}, plural ''zoa'' (from [[greek language|Greek]] ''zòon'' ζώον meaning animal; plural ''zòa'', ζώα). |
A '''zooid''' or '''zoöid''' {{IPAc-en|ˈ|z|oʊ|.|ɔɪ|d}} is a single [[animal]] that is part of a [[colony (biology)|colonial]] animal. This lifestyle has been adopted by animals from separate unrelated taxa. Zooids are [[multicellular]]; their structure is similar to that of other solitary animals. The zooids can either be directly connected by tissue (e.g. [[coral]]s, [[Catenulida]], [[Siphonophorae]], [[Pyrosome]] or [[Ectoprocta]]) or share a common exoskeleton (e.g. [[Bryozoa]] or [[Pterobranchia]]). The colonial organism as a whole is called a ''zoon'' {{IPAc-en|ˈ|z|oʊ|.|ɒ|n}}, plural ''zoa'' (from [[greek language|Greek]] ''zòon'' ζώον meaning animal; plural ''zòa'', ζώα). |
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Revision as of 15:37, 19 January 2019
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A zooid or zoöid /ˈzoʊ.ɔɪd/ is a single animal that is part of a colonial animal. This lifestyle has been adopted by animals from separate unrelated taxa. Zooids are multicellular; their structure is similar to that of other solitary animals. The zooids can either be directly connected by tissue (e.g. corals, Catenulida, Siphonophorae, Pyrosome or Ectoprocta) or share a common exoskeleton (e.g. Bryozoa or Pterobranchia). The colonial organism as a whole is called a zoon /ˈzoʊ.ɒn/, plural zoa (from Greek zòon ζώον meaning animal; plural zòa, ζώα).
The term zooid has historically also been used for an organic cell or organized body that has independent movement within a living organism, especially a motile gamete such as a spermatozoon (in the case of algae now zoid), or an independent animal-like organism produced asexually, as by budding or fission.
See also
- Siphonophorae for colonial Hydrozoa which superficially resemble the other Cnidaria colloquially referred to as "jellyfish"
- Pyrosome for colonial Chordates in Tunicata
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