Search results
Results from the WOW.Com Content Network
Adult ascidian tunicates are sessile, immobile and permanently attached to rocks or other hard surfaces on the ocean floor. Thaliaceans (pyrosomes, doliolids, and salps) and larvaceans on the other hand, swim in the pelagic zone of the sea as adults.
Ciona. Species: C. intestinalis. Binomial name. Ciona intestinalis. (Linnaeus, 1767) Ciona intestinalis (sometimes known by the common name of vase tunicate) is an ascidian (sea squirt), a tunicate with very soft tunic. Its Latin name literally means "pillar of intestines", referring to the fact that its body is a soft, translucent column-like ...
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 "tunic" made of a polysaccharide. Ascidians are found all over the world, usually in shallow water with salinities over 2.5%.
Diagrammatic section of an Ascidia, representing the three sacs and the branchial sac as the pharynx or throat: (a) branchial orifice; (b) atrial orifice; (c) tunic or test (d) mantle; (e) branchial sac; (f) gullet; (g) stomach; (h) anal orifice; (i) dorsal lamina; the dotted line indicates the endostyle.
Larvacean. Larvaceans or appendicularians, class Appendicularia, are solitary, free-swimming tunicates found throughout the world's oceans. While larvaceans are filter feeders like most other tunicates, they keep their tadpole-like shape as adults, with the notochord running through the tail. They can be found in the pelagic zone, specifically ...
In modern representatives of ascidians, the contraction of the circular and longitudinal musculature causes the ascidian to squirt or shrink. Its presence in Megasiphon indicates that these behavioral traits typical of tunicates had already evolved approximately 500 million years ago. [1]
Botryllus schlosseri. Botryllus schlosseri is a colonial ascidian tunicate. It is commonly known as the star tunicate, [2] but it also has several other common names, including star ascidian and golden star tunicate. [3][4] Colonies grow on slow-moving, submerged objects, plants, and animals in nearshore saltwater environments.
Styela montereyensis, also called the stalked tunicate, Monterey stalked tunicate, and the long-stalked sea squirt [2] is a solitary [3] ascidian tunicate. [1] It has a cylindrical, yellow to dark reddish-brown body and a thin trunk that anchors it to rocks. It is found in subtidal areas of the western coast of North America from Vancouver ...