Thaliacea
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220694550
2008-06-21T03:10:17Z
DumZiBoT
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robot Adding: [[it:Thaliacea]]
{{Taxobox
| name = Thaliacea
| image = Salpenkette.jpg
| regnum = [[Animal]]ia
| phylum = [[Chordata]]
| subphylum = [[Urochordata]]
| classis = '''Thaliacea'''
| classis_authority = [[Cesare Nielsen|Nielsen]], 1995
| subdivision_ranks = [[Order (biology)|Orders]]
| subdivision =
* [[Pyrosoma|Pyrosomida]]
* [[Salpida]]
* [[Doliolida]]
}}
The '''Thalicea''' comprise a class of marine animals within the subphylum [[Urochordata]]. Unlike their bottom-dwelling relatives the [[ascidiacea|ascidians]], thaliaceans are free-floating for their entire lifespan. There are three orders of Thaliacea: [[Pyrosomida]], [[Doliolida]], and [[Salpia]]. [[Pyrosoma|Pyrosomes]] are colonies of tiny zooids arranged around a central chamber called the cloaca. As the water exhaled by the zooids exits the [[cloaca]] through a common opening, the water movement slowly propels the pyrosome through the sea. Doliolids and salps alternate between solitary and [[Colony (biology)|colonial]] life stages. Salp colonies can be several meters in length. Doliolids and salps rely on muscular action to propel themselves through surrounding sea water. All of the thaliceans are [[filter feeder]]s. They have a barrel-shaped body through which they pump water, propelling them through the sea and from which they extract food.
== External links ==
*[http://www.earthlife.net/inverts/thaliacea.html Information on Thaliacea at earthlife.net]
*[http://www.amonline.net.au/fishes/fishfacts/fish/salp.htm Information on Thaliacea at amonline.net.au]
*[http://www.ascidians.com/families/thaliacea/thaliacea.htm Information on Thaliacea at ascidians.com]
{{Chordata}}
[[Category:Tunicates]]
{{chordate-stub}}
[[cs:Salpy]]
[[de:Salpen]]
[[es:Thaliacea]]
[[fr:Thaliacea]]
[[it:Thaliacea]]
[[lv:Salpu klase]]
[[ja:タリア綱]]
[[no:Salper]]
[[pl:Sprzągle]]
[[pt:Thaliacea]]
[[sk:Salpy]]
[[fi:Salpat]]
[[zh:樽海鞘纲]]