Thaliacea 832789 220694550 2008-06-21T03:10:17Z DumZiBoT 6085301 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]]