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Hydractiniidae
Hydractiniidae is a cnidarian family of athecate hydroids Anthoathecata, or the athecate hydroids, are an order of hydrozoans belonging to the phylum Cnidaria. A profusion of alternate scientific names exists for this long-known, heavily discussed, and spectacular group. It has also been called Gymno .... Genera The World Register of Marine Species includes the following genera in the family: *'' Bouillonactinia'' Miglietta, McNally & Cunningham, 2010 *'' Clava'' Gmelin, 1788 *'' Clavactinia'' Thornely, 1904 *'' Cnidostoma'' Vanhöffen, 1911 *'' Distichozoon'' Cairns, 2015 *'' Fiordlandia'' Schuchert, 1996 *'' Hydractinia'' Van Beneden, 1844 *'' Hydrissa'' Stechow, 1922 *'' Hydrocorella'' Stechow, 1921 *'' Janaria'' Stechow, 1921 *'' Parahydractinia'' Xu & Huang, 2006 *'' Podocoryna'' M. Sars, 1846 *'' Schuchertinia'' Miglietta, McNally & Cunningham, 2010 *'' Stylactis'' Allman, 1864 References Filifera Cnidarian families {{Anthoathecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydractiniidae
Hydractiniidae is a cnidarian family of athecate hydroids Anthoathecata, or the athecate hydroids, are an order of hydrozoans belonging to the phylum Cnidaria. A profusion of alternate scientific names exists for this long-known, heavily discussed, and spectacular group. It has also been called Gymno .... Genera The World Register of Marine Species includes the following genera in the family: *'' Bouillonactinia'' Miglietta, McNally & Cunningham, 2010 *'' Clava'' Gmelin, 1788 *'' Clavactinia'' Thornely, 1904 *'' Cnidostoma'' Vanhöffen, 1911 *'' Distichozoon'' Cairns, 2015 *'' Fiordlandia'' Schuchert, 1996 *'' Hydractinia'' Van Beneden, 1844 *'' Hydrissa'' Stechow, 1922 *'' Hydrocorella'' Stechow, 1921 *'' Janaria'' Stechow, 1921 *'' Parahydractinia'' Xu & Huang, 2006 *'' Podocoryna'' M. Sars, 1846 *'' Schuchertinia'' Miglietta, McNally & Cunningham, 2010 *'' Stylactis'' Allman, 1864 References Filifera Cnidarian families {{Anthoathecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clava (cnidarian)
''Clava'' is a monotypic genus of hydrozoans in the family Hydractiniidae. It contains only one accepted species, ''Clava multicornis''. Other names synonymous with ''Clava multicornis'' include ''Clava cornea'', ''Clava diffusa'', ''Clava leptostyla'', ''Clava nodosa'', ''Clava parasitica'', ''Clava squamata'', ''Coryne squamata'', ''Hydra multicornis'', and ''Hydra squamata''. The larvae form of the species has a well developed nervous system compared to its small size. The adult form is also advanced due to its ability to stay dormant during unfavorable periods. Anatomy The larval form (planula) and adult form show two different body plans. The planula is a small, free-living larva, and is diploblastic with two layers: the endoderm and ectoderm with an additional mesoglea. The ectoderm thickness decreases from the anterior to posterior poles. Further, the ectoderm has mucous gland cells for secretory purposes, support, and sense along with cnidocytes with nematocysts in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydractinia Altispina
''Hydractinia altispina'', or high-spined commensal hydroid, is a small colonial hydroid in the family Hydractiniidae. Description High-spined commensal hydroids grow as a fuzzy-looking orange coat usually on the shell of a marine snail, the scaly dogwhelk ''Nucella squamosa ''Nucella squamosa'', common name the scaly dogwhelk, is a species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the larg ...''. Individual polyps grow to 0.4 cm in total height. The polyps are naked and cluster on the shell surface, interspersed with defensive spines and tiny ball-like reproductive structures.Millard, N.A.H. 1975. Monograph on the Hydroida of Southern Africa. ''Ann. S. Afr. Mus.'' 68:1-513 Distribution This colonial animal is found only off the southern African coast from Luderitz to False Bay, Cape Town subtidally and to at least 30m under water. References ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydractinia
''Hydractinia'' is a genus of commensal athecate hydroids which belong to the family Hydractiniidae. ''Hydractinia'' species mostly live on hermit-crabbed marine gastropod shells. One species, '' Hydractinia echinata'', is commonly known as snail fur. Another species, ''H. minoi'', is known to be commensal with stingfishes of the genus '' Minous''. Species References ''Hydractinia''at World Register of Marine Species Hydractiniidae Hydrozoan genera {{anthoathecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stylactis
''Stylactis'' is a genus of hydrozoans belonging to the family Hydractiniidae Hydractiniidae is a cnidarian family of athecate hydroids Anthoathecata, or the athecate hydroids, are an order of hydrozoans belonging to the phylum Cnidaria. A profusion of alternate scientific names exists for this long-known, heavily di .... The species of this genus are found in Europe and Northern America. Species: *'' Stylactaria hooperii'' *'' Stylactis fucicola'' *'' Stylactis inermis'' References Hydractiniidae Hydrozoan genera {{anthoathecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Athecate Hydroids
Anthoathecata, or the athecate hydroids, are an order of hydrozoans belonging to the phylum Cnidaria. A profusion of alternate scientific names exists for this long-known, heavily discussed, and spectacular group. It has also been called Gymnoblastea and (with or without an emended ending ''-ae''), Anthomedusa, Athecata, Hydromedusa, and Stylasterina. There are about 1,200 species worldwide.Schuchert, P. (2014). Anthoathecata. Accessed through: Schuchert, P. (2014) World Hydrozoa database at http://www.marinespecies.org/hydrozoa/aphia.php?p=taxdetails&id=13551 on 2014-10-31 These hydrozoans always have a polyp stage. Their hydranths grow either solitary or in colonies. There is no firm perisarc around the polyp body. The medusae, or jellyfish, are solitary animals, with tentacles arising from the bell margin, lacking statocysts but possessing radial canals. Their gonads are on the manubrium ("handle").Bouillon, J.; Gravili, C.; Pagès, F.; Gili, J.-M.; Boero, F. (2006). An in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schuchertinia
''Schuchertinia'' is a genus of commensal athecate hydroids in the family Hydractiniidae Hydractiniidae is a cnidarian family of athecate hydroids Anthoathecata, or the athecate hydroids, are an order of hydrozoans belonging to the phylum Cnidaria. A profusion of alternate scientific names exists for this long-known, heavily di .... Species The World Register of Marine Species includes the following species in the genus: *'' Schuchertinia allmanii'' (Bonnevie, 1898) *'' Schuchertinia antonii'' (Miglietta, 2006) *'' Schuchertinia conchicola'' (Yamada, 1947) *'' Schuchertinia epiconcha'' (Stechow, 1908) *'' Schuchertinia milleri'' (Torrey, 1902) *'' Schuchertinia reticulata'' (Hirohito, 1988) *'' Schuchertinia uchidai'' (Yamada, 1947) References Hydractiniidae Hydrozoan genera {{anthoathecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Janaria
''Janaria'' is a genus of commensal athecate hydroids in the family Hydractiniidae. It is a monotypic genus and the only species is ''Janaria mirabilis'', commonly known as staghorn hydrocoral. It is a colonial species and lives on a shell occupied by a hermit crab. It is native to the tropical and semitropical eastern Pacific Ocean. Description ''Janaria mirabilis'' is similar in appearance to a colonial coral, but comes from a quite separate group of cnidarians. The adult hydrocoral can be up to high and a similar width. It consists of a single horizontal branch and three or four vertical branches. The branches are straight or slightly curved and have blunt tips which are half as wide as the branches, the colour usually being cream or pale tan. The branches are calcified and each bears numerous polyps, the animal having been described as resembling a "fuzzy glove of feeding polyps". Distribution This hydrocoral is native to the tropical and semitropical eastern Pacific Ocean, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrocorella
''Hydrocorella'' is a small genus of athecate hydroids in the family Hydractiniidae Hydractiniidae is a cnidarian family of athecate hydroids Anthoathecata, or the athecate hydroids, are an order of hydrozoans belonging to the phylum Cnidaria. A profusion of alternate scientific names exists for this long-known, heavily di .... Species *'' Hydrocorella africana'' Stechow, 1921 *'' Hydrocorella calcarea'' (Carter, 1977) *'' Hydrocorella spinifera'' (Stechow, 1962) References Hydractiniidae Hydrozoan genera {{anthoathecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Filifera
Filifera is a suborder of hydrozoans in the order Anthoathecata. They are found in marine, brackish and freshwater habitats. Characteristics Members of this suborder are characterised by the filiform tentacles of the polyps which do not terminate in knobs. The rose corals, family Stylasteridae, secrete calcium carbonate exoskeletons around a network of stolons. Families According to the World Register of Marine Species, the following families are found in this suborder : * Australomedusidae Russell, 1971 * Axoporidae Boschma, 1951 † * Balellidae Stechow, 1922 *Bougainvilliidae Lütken, 1850 * Bythotiaridae Maas, 1905 *Clathrozoellidae Peña Cantero, Vervoort & Watson, 2003 * Cordylophoridae von Lendenfeld, 1885 * Cytaeididae L. Agassiz, 1862 * Eucodoniidae Schuchert, 1996 *Eudendriidae L. Agassiz, 1862 * Heterotentaculidae Schuchert, 2010 *Hydractiniidae L. Agassiz, 1862 * Jeanbouilloniidae Pagès, Flood & Youngbluth, 2006 *Magapiidae Schuchert & Bouillon, 2009 * Niobiida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis Agassiz
Jean Louis Rodolphe Agassiz ( ; ) FRS (For) FRSE (May 28, 1807 – December 14, 1873) was a Swiss-born American biologist and geologist who is recognized as a scholar of Earth's natural history. Spending his early life in Switzerland, he received a PhD at Erlangen and a medical degree in Munich. After studying with Georges Cuvier and Alexander von Humboldt in Paris, Agassiz was appointed professor of natural history at the University of Neuchâtel. He emigrated to the United States in 1847 after visiting Harvard University. He went on to become professor of zoology and geology at Harvard, to head its Lawrence Scientific School, and to found its Museum of Comparative Zoology. Agassiz is known for observational data gathering and analysis. He made institutional and scientific contributions to zoology, geology, and related areas, including multivolume research books running to thousands of pages. He is particularly known for his contributions to ichthyological classification, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
