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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 (biology), 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 pre ... 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] |
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'' Leloup, 1932 ** Genus ''Botrucnidifer'' Carlgren, 1912 ** Genus '' Calpanthula'' van Beneden, 1897 ** Genus '' Cerianthula'' Beneden, 1898 ** Genus '' Gymnanthula'' Leloup, 1964 ** Genus ''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 co ...'' van Beneden, 1897 ** Genus '' Ovanthula'' van Beneden, 1897 ** Genus '' Sphaeranthula'' Leloup, 1955 References Spirularia Cnidarian families {{anthozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 i ... [...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'' Leloup, 1942 * ''Isodactylactis'' Carlgren, 1924 * '' Nautanthus'' Leloup, 1964 * ''Pachycerianthus ''Pachycerianthus'' is a genus of marine tube-dwelling anemones in the family Cerianthidae. Species The following species were included in the genus according to the World Register of Marine Species: *'' Pachycerianthus aestuarii'' (Torrey ...'' Roule, 1904 * '' Paradactylactis'' Carlgren, 1924 * '' Parovactis'' Leloup, 1964 * '' Peponactis'' Van Beneden, 1897 * '' Plesiodactylactis'' Leloup, 1942 * '' Sacculactis'' Leloup, 1964 * '' Solasteractis'' Van Beneden, 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerianthus Filiformis
''Cerianthus filiformis'' is a species of tube-dwelling sea anemone in the family Cerianthidae. It is found throughout the tropical waters of the western Indo-Pacific Ocean. Description ''C. filiformis'' resembles the sea anemone and has a stretched and muscularised body which can reach 35 cm. Its body has the shape of a large polyp with numerous mobile tentacles. (in French). The tint of the tentacles is variously white, green, orange or purple and the central tentacles may have a different coloration from the marginal tentacles. Distribution and habitat ''C. filiformis'' is widespread throughout the tropical waters of the western Indo-Pacific Ocean. Tube dwelling anemones such as ''C. filiformis'' live in a mucous Mucus ( ) is a slippery aqueous secretion produced by, and covering, mucous membranes. It is typically produced from cells found in mucous glands, although it may also originate from mixed glands, which contain both serous and mucous cells. It ... t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornelis Den Hartog
Cornelis is a Dutch form of the male given name Cornelius. Some common shortened versions of Cornelis in Dutch are Cees, Cor, Corné, Corneel, Crelis, Kees, Neel and Nelis. Cornelis (Kees) and Johannes (Jan) used to be the most common given names in the Low Countries, and the origin of the term Yankees is commonly thought to derive from the term Jan-Kees for the Dutch settlers in New Netherland. Among the notable persons named Cornelis are: * Cornelis Engebrechtsz (c. 1462–1527), painter from Leiden * Cornelis Massijs (c. 1508–1556), painter from Flanders, Belgium * Cornelis Floris de Vriendt (1513/14-1575), architect and sculptor * Cornelis Cort (c. 1533–1578), engraver and draughtsman * Cornelis Corneliszoon (c. 1550–1607), inventor of the wind powered sawmill * Cor Dillen (c. 1920–2009), director of Philips and their CEO in South America * Cornelis van Haarlem (1562–1638), leading Northern Mannerist painter * Cornelis de Houtman (1565–1599), explorer who ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Order (biology)
Order ( la, ordo) is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between family and class. In biological classification, the order is a taxonomic rank used in the classification of organisms and recognized by the nomenclature codes. An immediately higher rank, superorder, is sometimes added directly above order, with suborder directly beneath order. An order can also be defined as a group of related families. What does and does not belong to each order is determined by a taxonomist, as is whether a particular order should be recognized at all. Often there is no exact agreement, with different taxonomists each taking a different position. There are no hard rules that a taxonomist needs to follow in describing or recognizing an order. Some taxa are accepted almost universally, while others are recognized only rarely. The name of an order is usually written with a capital letter. For some groups of organisms, their orders may follo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cnidaria
Cnidaria () is a phylum under kingdom Animalia containing over 11,000 species of aquatic animals found both in Fresh water, freshwater and Marine habitats, marine environments, predominantly the latter. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey. Their bodies consist of mesoglea, a non-living jelly-like substance, sandwiched between two layers of epithelium that are mostly one cell (biology), cell thick. Cnidarians mostly have two basic body forms: swimming Medusa (biology), medusae and Sessility (motility), sessile polyp (zoology), polyps, both of which are Symmetry (biology)#Radial symmetry, radially symmetrical with mouths surrounded by tentacles that bear cnidocytes. Both forms have a single Body orifice, orifice and body cavity that are used for digestion and respiration (physiology), respiration. Many cnidarian species produce Colony (biology), colonies that are single organisms composed of medusa-like or polyp (z ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Class (biology)
In biological classification, class ( la, classis) is a taxonomic rank, as well as a taxonomic unit, a taxon, in that rank. It is a group of related taxonomic orders. Other well-known ranks in descending order of size are life, domain, kingdom, phylum, order, family, genus, and species, with class fitting between phylum and order. History The class as a distinct rank of biological classification having its own distinctive name (and not just called a ''top-level genus'' ''(genus summum)'') was first introduced by the French botanist Joseph Pitton de Tournefort in his classification of plants that appeared in his ''Eléments de botanique'', 1694. Insofar as a general definition of a class is available, it has historically been conceived as embracing taxa that combine a distinct ''grade'' of organization—i.e. a 'level of complexity', measured in terms of how differentiated their organ systems are into distinct regions or sub-organs—with a distinct ''type'' of construc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cnidocyte
A cnidocyte (also known as a cnidoblast or nematocyte) is an explosive Cell (biology), 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 cell defines the phylum Cnidaria (corals, sea anemones, Hydra (genus), hydrae, jellyfish, etc.). Cnidae are used to capture prey and as a defense against predators. A cnidocyte fires a structure that contains a toxin within the cnidocyst; this is responsible for the stings delivered by a cnidarian. Structure and function Each cnidocyte contains an organelle called a cnida, cnidocyst, nematocyst, ptychocyst or spirocyst. This organelle consists of a bulb-shaped capsule containing a coiled hollow tubule structure attached to it. An immature cnidocyte is referred to as a cnidoblast or nematoblast. The externally oriented side of the cell has a hair-like trigger called a cnidocil, which is a mechano- and chemo-receptor. When ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
