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Clavelina moluccensis, the bluebell tunicate Botrylloides violaceus showing oral tentacles at openings of buccal siphons. About 3,000 species of tunicate exist in the world's oceans, living mostly in shallow water. The most numerous group is the ascidians; fewer than 100 species of these are found at depths greater than 200 m (660 ft). [12]
References A adhesive organ 1. An organ present at the anterior end of ascidian larvae, serving to attach the larva to the substrate during its metamorphosis. It is usually made of three papillae. 2. The individual papillae. atrium atrial pore atrial siphon Also excurrent siphon or exhalant siphon. Opening through which water exits the branchial basket in ascidians. B blastozooid Sexual ...
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.
Clavelina picta, common name the painted tunicate, is a species of tunicate (sea squirt), in the genus Clavelina (the "little bottles"). These animals, like all ascidians , are sessile filter feeders .
The earliest of these disputed fossils are the tunicate-like organisms Burykhia and Ausia from the Ediacaran period. While these may in fact be tunicates, others have interpreted them as cnidarians [ 25 ] or sponges , [ 26 ] and as such their true affinity remains uncertain.
Their common name comes from their appearance, consisting of a knobbly 'bulb' or flower attached to a long stalk. Sea tulips come in a variety of colours, including white, pink, yellow, orange and purple. The colouration of sea tulips depends upon their association with a symbiotic sponge that covers their surface.
Tunicata stubs (216 P) Pages in category "Tunicates" The following 5 pages are in this category, out of 5 total. This list may not reflect recent changes. ...
Pyrosomes are free-floating colonial tunicates in family Pyrosomatidae.There are three genera, Pyrosoma, Pyrosomella and Pyrostremma, and eight species. [3] [4] They usually live in the upper layers of the open ocean in warm seas, although some may be found at greater depths.