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Ascidiacea, commonly known as the ascidians or sea squirts, is a paraphyletic class in the subphylum Tunicata of sac-like marine invertebrate filter feeders. [2] Ascidians are characterized by a tough outer test or "tunic" made of the polysaccharide cellulose .
Ascidiidae ("same-sac family") is a family of tunicates in the class Ascidiacea. [1] [2] Some species contain elevated amounts of vanadium. There are 4 genera: Ascidia; Ascidiella; Fimbrora; Phallusia; Psammascidia
Stolidobranchia is an order of tunicates in the class Ascidiacea. [1] The group includes both colonial and solitary animals. They are distinguished from other tunicates by the presence of folded pharyngeal baskets. This provides the etymology of their name: in ancient Greek, στολίς, ίδος means the "fold" of a cloth.
Clavelina ("little bottle") is genus of sea squirts (the Ascidiacea), containing the following species: [2] Clavelina amplexa Kott, 2002 Clavelina arafurensis Tokioka, 1952
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Eudistoma is a genus of sea squirts belonging to the class Ascidiacea. It was first described in 1909 by Maurice Caullery. Originally it was thought to be a subgenus of Distoma. [1] Eudistoma is the most species-rich genus in the family Polycitoridae, with 124 valid species as of 2014. They are found in tropical and temperate waters; some ...
[1] [3] Its range includes the Baltic Sea, the English Channel, and northwestern France as far south as Quiberon, but it is absent from some localities and has a number of sub-populations. Colonies grows on rocks and boulders in areas with strong currents, and sometimes on the holdfasts of kelp , at depths from the lower shore down to a few metres.
Didemnum molle is a suspension feeder.Water is drawn into the body of each zooid through the numerous buccal siphons, phytoplankton, zooplankton and fine organic particles are filtered out and the water is exhaled through the atrial siphon.