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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
Ascidia incrassata, "Red spotted sea squirt".. The group includes both colonial and solitary animals. They are distinguished from other sea squirts by the presence of longitudinal vessels in the pharyngeal basket.
Sycozoa cerebriformis, (common name - brain ascidian) [2] is a sea squirt in the family Holozoidae, first described by Jean René Constant Quoy and Joseph Paul Gaimard in 1834 as Aplidie cerebriforme.
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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.
