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Halcampidae
Halcampidae is a family of sea anemones. Members of this family usually live with their column buried in sand or other soft substrates. Genera Genera in the family include: * '' Acthelmis'' Lütken, 1875 * '' Cactosoma'' Danielssen, 1890 * '' Calamactinia'' Carlgren, 1949 * '' Calamactis'' Carlgren, 1951 * '' Halcampa'' Gosse, 1858 * '' Halcampaster'' * '' Halcampella'' Andres, 1883 * '' Halcampoides'' Danielssen, 1890 * '' Halianthella'' * '' Kodioides'' * ''Mena'' * '' Metedwardsia'' * '' Neohalcampa'' * '' Parahalcampa'' * '' Pentactinia'' Carlgren, 1900 * '' Scytophorus'' Hertwig, 1882 * '' Siphonactinopsis'' Carlgren, 1921 Characteristics Species of Halcampidae mostly have elongated columns which are sometimes differentiated into different regions. The base is usually rounded but in some species it is flattened. There is no sphincter. There are up to forty tentacles, all of equal length. There are up to twenty pairs of perfect mesenteries (internal partitions) with strong re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halcampidae
Halcampidae is a family of sea anemones. Members of this family usually live with their column buried in sand or other soft substrates. Genera Genera in the family include: * '' Acthelmis'' Lütken, 1875 * '' Cactosoma'' Danielssen, 1890 * '' Calamactinia'' Carlgren, 1949 * '' Calamactis'' Carlgren, 1951 * '' Halcampa'' Gosse, 1858 * '' Halcampaster'' * '' Halcampella'' Andres, 1883 * '' Halcampoides'' Danielssen, 1890 * '' Halianthella'' * '' Kodioides'' * ''Mena'' * '' Metedwardsia'' * '' Neohalcampa'' * '' Parahalcampa'' * '' Pentactinia'' Carlgren, 1900 * '' Scytophorus'' Hertwig, 1882 * '' Siphonactinopsis'' Carlgren, 1921 Characteristics Species of Halcampidae mostly have elongated columns which are sometimes differentiated into different regions. The base is usually rounded but in some species it is flattened. There is no sphincter. There are up to forty tentacles, all of equal length. There are up to twenty pairs of perfect mesenteries (internal partitions) with strong re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halianthella
''Halianthella'' is a genus of sea anemones in the family Halcampidae Halcampidae is a family of sea anemones. Members of this family usually live with their column buried in sand or other soft substrates. Genera Genera in the family include: * '' Acthelmis'' Lütken, 1875 * '' Cactosoma'' Danielssen, 1890 * '' Ca .... Species Species in the genus include: * '' Halianthella annularis'' Carlgren, 1938 * '' Halianthella kerguelensis'' (Studer, 1879) References Halcampidae Hexacorallia genera {{Actiniaria-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metridioidea
Metridioidea is a superfamily of sea anemones in the order Actiniaria. Families in the superfamily Metridioidea include: * Family Acontiophoridae * Family Acricoactinidae * Family Actinoscyphiidae * Family Aiptasiidae * Family Aiptasiomorphidae * Family Aliciidae Aliciidae is a family of sea anemones, comprising the following genera: * '' Alicia'' Johnson, 1861 * '' Cradactis'' McMurrich, 1893 * '' Lebrunia'' Duchassaing de Fonbressin & Michelotti, 1860 * ''Phyllodiscus ''Phyllodiscus'' is a monotypic ... * Family Amphianthidae * Family Andvakiidae * Family Antipodactinidae * Family Bathyphelliidae * Family Boloceroididae * Family Diadumenidae * Family Gonactiniidae * Family Halcampidae * Family Haliactinidae * Family Hormathiidae * Family Isanthidae * Family Kadosactinidae * Family Metridiidae * Family Nemanthidae * Family Nevadneidae * Family Octineonidae * Family Ostiactinidae * Family Phelliidae * Family Sagartiidae * Family Sagartiomorphidae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siphonoglyph
The siphonoglyph is a ciliated groove at one or both ends of the mouth of sea anemones and some corals. The siphonoglyph extends into a pharynx and is used to create currents of water into the pharynx. These water currents are important for respiration and maintenance of internal pressure. The presence of a siphonoglyph (or two siphonoglyphs) in several anthozoans (including species from the orders Zoantharia, Ceriantharia, Antipatharia, and Octocorallia) introduces an element of bilateral symmetry Symmetry in biology refers to the symmetry observed in organisms, including plants, animals, fungi, and bacteria. External symmetry can be easily seen by just looking at an organism. For example, take the face of a human being which has a pla ... into the particular species' body plan (Beklemishev 1969). Some have argued that the presence of bilateral symmetry in these anthozoans is evidence that the ancestor to bilaterians and cnidarians may have had a bilaterally symmetrical bod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesentery (zoology)
In zoology, a mesentery is a membrane inside the body cavity of an animal. The term identifies different structures in different phylum, phyla: in vertebrates it is a double fold of the peritoneum enclosing the intestines; in other organisms it forms complete or incomplete partitions of the body cavity, whether that is the coelom or, as in the Anthozoa, the gastrovascular cavity. The word "mesentery" is derived from the Greek ''mesos'', "in the middle" and ''enteron'', an "intestine". Vertebrates In vertebrates, a mesentery is a membrane consisting of a double fold of peritoneum that encloses the intestines and their associated organs and connect them with the dorsal wall of the abdominal cavity. In invertebrates, a mesentery is a support or partition in a body cavity serving a similar function to the mesenteries of vertebrates. Bilateria In Bilateria, bilaterally symmetrical organisms there is often a major mesentery separating the two halves of the coelom. In segmented orga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
