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Ceriantharia
Tube-dwelling anemones or ceriantharians look very similar to sea anemones but belong to an entirely different class of anthozoans. They are solitary, living buried in soft sediments. Tube anemones live inside and can withdraw into tubes, which are composed of a fibrous material made from secreted mucus and threads of nematocyst-like organelles known as ptychocysts. Within the tubes of these ceriantharians, more than one polyp is present, which is an exceptional trait because species that create tube systems usually contain only one polyp per tube. Ceriantharians were formerly classified in the taxon Ceriantipatharia along with the black corals but have since been moved to their own subclass, Ceriantharia. Ceriantharians have a crown of tentacles that are composed of two whorls of distinctly different sized tentacles. The outer whorl consists of large tentacles that extend outwards. These tentacles taper to points and are mostly used in food capture and defence. The smaller inn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anthozoa
Anthozoa is a subphylum of marine invertebrates which includes the sea anemones, Scleractinia, stony corals and Alcyonacea, soft corals. Adult anthozoans are almost all attached to the seabed, while their larvae can disperse as part of the plankton. The basic unit of the adult is the polyp (zoology), polyp; this consists of a cylindrical column topped by a disc with a central mouth surrounded by tentacles. Sea anemones are mostly solitary, but the majority of corals are Colony (biology), colonial, being formed by the budding of new polyps from an original, founding individual. Colonies are strengthened by calcium carbonate and other materials and take various massive, plate-like, bushy or leafy forms. Anthozoa is included within the phylum Cnidaria, which also includes the jellyfish, Box jellyfish, box jellies and parasitic Myxozoa and Polypodiozoa. The two main subclasses of Anthozoa are the Hexacorallia, members of which have six-fold symmetry in biology, symmetry and includes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Anemone
Sea anemones are a group of predation, predatory marine invertebrates of the order (biology), order Actiniaria. Because of their colourful appearance, they are named after the ''Anemone'', a terrestrial flowering plant. Sea anemones are classified in the phylum Cnidaria, class Anthozoa, subclass Hexacorallia. As cnidarians, sea anemones are related to corals, jellyfish, tube-dwelling anemones, and ''hydra (genus), Hydra''. Unlike jellyfish, sea anemones do not have a Jellyfish#Life history and behavior, medusa stage in their life cycle. A typical sea anemone is a single polyp (zoology), polyp attached to a hard surface by its base, but some species live in soft sediment, and a few float near the surface of the water. The polyp has a columnar trunk topped by an oral disc with a ring of tentacles and a central mouth. The tentacles can be retracted inside the body cavity or expanded to catch passing prey. They are armed with cnidocytes (stinging cells). In many species, additional n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spirularia
Spirularia is an order of marine Cnidarians, tube-dwelling anemones, in the subclass Ceriantharia. It is one of the two orders making up Ceriantharia and includes two families, Botrucnidiferidae and Cerianthidae, and around 99 species. The two orders differ in the makeup of their cnidome (the types of cnidocyte A cnidocyte (also known as a cnidoblast or nematocyte) is an explosive cell containing one large secretory organelle called a cnidocyst (also known as a cnida () or nematocyst) that can deliver a sting to other organisms. The presence of this c ... present), the relative sizes of the oral discs and the shape and structure of the mesenteries. These anemones dwell in parchment-like tubes immersed in soft sediment, and have two whorls of tentacles, the outer tentacles being much longer than the inner ones. References Ceriantharia Cnidarian orders {{anthozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerianthus
''Cerianthus'' is a genus of tube-dwelling anemones in the family Cerianthidae. Members of the genus are found worldwide. They are predators, scavengers and omnivores. Characteristics Members of this genus do not have a pedal disc with which to hold themselves in position. Instead they live semi-buried in soft substrate surrounded by a parchment-like tube which they secrete. This surrounds the whole anemone up to its crown of tentacles. Sand grains, debris and shell fragments usually stick to the outer side of the tube. When it is disturbed, the anemone retracts swiftly back into the tube. Some of the larger species can have a column of up to in length. The longitudinal muscles in the trunk are powerful but the transverse ones are weak. The outer ring of tentacles are long and tapering. The tube is flexible and the anemone can extend its tentacles a surprisingly long way. The inner ring of tentacles surrounds the central mouth and assists in pushing food inside. Species The fol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerianthidae
Cerianthidae is a family of tube-dwelling anemones in the order Spirularia of the subclass Ceriantharia. Genera The World Register of Marine Species includes the following genera in the family: * ''Anthoactis'' Leloup, 1932 * ''Apiactis'' Beneden, 1897 * ''Bursanthus'' Leloup, 1968 * ''Ceriantheomorphe'' Carlgren, 1931 * ''Ceriantheopsis'' Carlgren, 1912 * ''Cerianthus'' Delle Chiaje, 1830 * ''Engodactylactis ''Engodactylactis'' is a genus of cnidaria Cnidaria () is a phylum under kingdom Animalia containing over 11,000 species of aquatic animals found both in freshwater and marine environments, predominantly the latter. Their distinguishing f ...'' Leloup, 1942 * '' Isodactylactis'' Carlgren, 1924 * '' Nautanthus'' Leloup, 1964 * '' Pachycerianthus'' Roule, 1904 * '' Paradactylactis'' Carlgren, 1924 * '' Parovactis'' Leloup, 1964 * '' Peponactis'' Van Beneden, 1897 * '' Plesiodactylactis'' Leloup, 1942 * '' Sacculactis'' Leloup, 1964 * '' Solasteractis'' Van Beneden, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnanthula
''Gymnanthula'' is a genus of cnidarians belonging to the family Botrucnidiferidae Botrucnidiferidae is a family of cnidarians belonging to the order Spirularia. Genera Genera: ** Genus '' Angianthula'' Leloup, 1964 ** Genus '' Atractanthula'' Leloup, 1964 ** Genus '' Botruanthus'' McMurrich, 1910 ** Genus '' Botrucnidiata'' .... The species of this genus are found in Northeastern Africa. Species: * ''Gymnanthula sennai'' (Calabresi, 1927) References Botrucnidiferidae Anthozoa genera {{Anthozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hensenanthula
''Hensenanthula'' is a genus of cnidarians belonging to the family Botrucnidiferidae. The species of this genus are found in Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe .... Species: *'' Hensenanthula dactylifera'' *'' Hensenanthula rotunda'' References Botrucnidiferidae Anthozoa genera {{Anthozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apiactis
''Apiactis'' is a genus of cnidarians belonging to the family Cerianthidae Cerianthidae is a family of tube-dwelling anemones in the order Spirularia of the subclass Ceriantharia. Genera The World Register of Marine Species includes the following genera in the family: * ''Anthoactis'' Leloup, 1932 * ''Apiactis'' Bene .... Species: *'' Apiactis bengalensis'' *'' Apiactis denticulata'' *'' Apiactis tentaculata'' References Cerianthidae Anthozoa genera {{Anthozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anthoactis
''Anthoactis'' is a genus of cnidarians belonging to the family Cerianthidae Cerianthidae is a family of tube-dwelling anemones in the order Spirularia of the subclass Ceriantharia. Genera The World Register of Marine Species includes the following genera in the family: * ''Anthoactis'' Leloup, 1932 * ''Apiactis'' Bene .... The species of this genus are found in Europe. Species: *'' Anthoactis armauerhanseni'' *'' Anthoactis australiae'' *'' Anthoactis benedeni'' References Cerianthidae Anthozoa genera {{Anthozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calpanthula
''Calpanthula'' is a genus of cnidarians belonging to the family Botrucnidiferidae Botrucnidiferidae is a family of cnidarians belonging to the order Spirularia. Genera Genera: ** Genus '' Angianthula'' Leloup, 1964 ** Genus '' Atractanthula'' Leloup, 1964 ** Genus '' Botruanthus'' McMurrich, 1910 ** Genus '' Botrucnidiata'' .... Species: * ''Calpanthula guinensis'' Van Beneden, 1897 References Botrucnidiferidae Anthozoa genera {{Anthozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
