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Entocodon
A gonophore is a reproductive organ in Hydrozoa that produces gametes. It is a sporosac, a medusa or any intermediate stage. The name is derived from the Greek words (, that which produces seed) and (, -bearing). Gonophores are borne on branching stalks that grow out as a ring from the hydranth (i.e. the hydroid polyp, bearing a mouth, digestive cavity and tentacles) wall. The germ cells are formed from the inner layer of the entocodon. The entocodon is the primordium (i.e. the first cells that give rise to the development of an organ) of the subumbrella (i.e. the concave oral surface of a medusa) in the development of medusae from the gonophore. The gonophores in the order Leptomedusae are borne on much reduced hydranths and are usually protected in a peridermal (i.e. belonging to a hydroid perisarc) gonotheca. Medusae forming on fully developed hydranths are extremely rare; usually the gonophores develop into medusae or into sessile sporosacs. The gonophores in the superfam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Milleporidae
Fire corals (''Millepora'') are a genus of colonial marine organisms that exhibit physical characteristics similar to that of coral. The name coral is somewhat misleading, as fire corals are not true corals but are instead more closely related to ''Hydra'' and other hydrozoans, making them hydrocorals. They make up the only genus in the monotypic family Milleporidae. Distinguishing characteristics Fire corals have a bright, yellow-green to brown skeletal covering, and are widely distributed in tropical and subtropical waters. They appear in small, brush-like growths on rocks and coral. Divers often mistake fire coral for seaweed, and accidental contact is common. Upon contact, an intense pain can be felt, lasting from two days to two weeks. Occasional relapses of post-treatment inflammation are common. Prominent side effects can include skin irritation, stinging or burning pain, erythema (skin redness), fever, and/or urticarian (hives) lesions. These side effects are due to ven ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coenosarc
In corals, the coenosarc is the living tissue overlying the stony skeletal material of the coral. It secretes the coenosteum, the layer of skeletal material lying between the corallites (the stony cups in which the polyps sit). The coensarc is composed of mesogloea between two thin layers of epidermis and is continuous with the body wall of the polyps. The coenosarc contains the gastrovascular canal system that links the polyps and allow them to share nutrients and symbiotic zooxanthellae Zooxanthellae is a colloquial term for single-celled dinoflagellates that are able to live in symbiosis with diverse marine invertebrates including demosponges, corals, jellyfish, and nudibranchs. Most known zooxanthellae are in the genus ''Sy .... References {{reflist Cnidarian anatomy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solanderiidae
''Solanderia'' is the sole genus of hydrozoans in the monotypic family Solanderiidae. They are commonly known as tree hydroids or sea fan hydroids. Description ''Solanderia'' hydroids forms large colonies. They are one of about 1000 species of athecate hydroids, which do not construct a skeletal covering for their polyps (as opposed to the thecate hydroids in the order Leptothecata. The chitinous skeleton is internal, branches, and may form anastomoses. The skeleton is formed by coalescence and modification of adjacent hydrocauline tubes. The coenosarc covers the entire colony and penetrates skeletal interstices. The hydranths cover the whole colony surface and are uniform in structure, cylindrical, with a single whorl of capitate tentacles around the mouth. Numerous similar tentacles are scattered over the body. ''Solanderia'' is known from its polyp or hydroid stage, and produces gonophores which release sperm and eggs for reproduction. Where known, the gonophores are cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cladocorynidae
Cladocorynidae is a family of cnidarians belonging to the order Anthoathecata 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 Gymnobl .... Genera: * '' Cladocoryne'' Rotch, 1871 * '' Pteroclava'' Weill, 1931 References Capitata Cnidarian families {{Anthoathecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennariidae
''Pennaria'' is a genus of hydrozoans. It is the only genus within the monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispe ... family Pennariidae. Species The following species are included in the genus: *'' Pennaria armata'' Vanhöffen, 1911 *'' Pennaria blistera'' Xu & Huang, 2006 *'' Pennaria disticha'' Goldfuss, 1820 *'' Pennaria grandis'' Kramp, 1928 *'' Pennaria wilsoni'' Bale, 1913 References Pennariidae Hydrozoan genera {{Anthoathecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tricyclusidae
''Tricyclusa'' is a monotypic genus of cnidarians belonging to the monotypic family Tricyclusidae. The only species is ''Tricyclusa singularis''. The species is found in Western Europe. References Capitata Hydrozoan genera Monotypic cnidarian genera {{Anthoathecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corymorphidae
Corymorphidae is a family of hydroid cnidarians 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 feature is cnidocytes, specialized cells that the .... For long placed in a presumed superfamily or infraorder Tubulariida of suborder Capitata, they are actually close relatives of the Hydridae and are now united with these and a number of relatives in a newly recognized suborder Aplanulata.Schuchert, P. (2013)Corymorphidae Allman, 1872.In: Schuchert, P. (2018). World Hydrozoa Database. Accessed through: World Register of Marine Species on 2018-02-03. Most, if not all species in this family grow on stalks and resemble small flowers. According to the World Register of Marine Species, the following genera are contained in this family: *'' Branchiocerianthus'' Mark, 1898 *'' Corymorpha'' M. Sars, 1835 *'' Euphysa'' Forbes, 1848 *'' Eu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tubulariidae
Tubulariidae is a family of hydroid cnidarians. For long placed in a presumed superfamily or infraorder Tubulariida of suborder Capitata, they are actually close relatives of the Hydridae and are now united with these and a number of relatives in a newly recognized suborder Aplanulata. Most if not all species in this family grow on stalks and resemble small flowers. According to the World Register of Marine Species, the following genera are found in this family: *'' Bouillonia'' Petersen, 1990 *''Ectopleura'' *''Hybocodon'' L.Agassiz, 1860 *'' Lobataria'' Watson, 2008 *''Ralpharia'' Watson, 1980 *'' Tubularia'' *''Zyzzyzus ''Zyzzyzus'' is a genus of marine tubulariid hydrozoan Hydrozoa (hydrozoans; ) are a taxonomic class of individually very small, predatory animals, some solitary and some colonial, most of which inhabit saline water. The colonies of the col ...'' References Aplanulata Cnidarian families {{Anthoathecata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Candelabridae
Candelabridae is a small family of cnidarians within the class Hydrozoa. Myriothelidae Hincks, 1868 and Symplectaneidae Fraser, 1941 are now accepted as synonyms of this family. Genera and Species According to the World Register of Marine Species, the following genera and 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 largest group of organisms in which any two individuals of the appropriate s ... exist in this family: *''Candelabrum'' de Blainville, 1880 synonym ''Myriothela'' Sars, 1850 **'' Candelabrum australe'' (Briggs, 1928) **'' Candelabrum austrogeorgiae'' (Jäderholm, 1904) **'' Candelabrum austro-georgiae'' Jäderholm, 1905 **'' Candelabrum capensis'' (Manton, 1940) **'' Candelabrum cocksii'' (Cocks, 1854) **'' Candelabrum fritchmanii'' Hewitt & Goddard, 2001 **'' Candelabrum giganteum'' (Bonnevie, 1898) **'' Candelabrum harrisoni'' (Bri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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