Ophiacanthida

	Ophiacanthida Ophiacanthida is an order of echinoderms belonging to the class Ophiuroidea. Families: * Ophiodermatina Ljungman, 1867 Ophiodermatidae Ophiomyxidae Ophiopezidae Ophiocomidae Ophiocomidae are a family of brittle stars of the suborder Ophiurina. Systematics and phylogeny Ophiocomidae has been placed (along with Ophionereididae) to the superfamily Ophiocomidea and infraorder Gnathophiurina or suborder Gnathophiurina ... * Ophiacanthina O'Hara, Hugall, Thuy, Stöhr & Martynov, 2017 Clarkcomidae Ophiacanthidae Ophiobyrsidae Ophiocamacidae Ophiopteridae Ophiotomidae Ophiojuridae References Ophiuroidea Echinoderm orders {{Ophiuroidea-stub ... [...More Info...] [...Related Items...] OR:** [Wikipedia] [Google] [Baidu]
picture info	Ophiuroidea Brittle stars, serpent stars, or ophiuroids (; ; referring to the serpent-like arms of the brittle star) are echinoderms in the class Ophiuroidea, closely related to starfish. They crawl across the sea floor using their flexible arms for locomotion. The ophiuroids generally have five long, slender, whip-like arms which may reach up to in length on the largest specimens. The Ophiuroidea contain two large clades, Ophiurida (brittle stars) and Euryalida (basket stars). Over 2,000 species of brittle stars live today. More than 1,200 of these species are found in deep waters, greater than 200 m deep. Range The ophiuroids diverged in the Early Ordovician, about 500 million years ago. Ophiuroids can be found today in all of the major marine provinces, from the poles to the tropics. Basket stars are usually confined to the deeper parts of this range; Ophiuroids are known even from abyssal (>6,000 m) depths. However, brittle stars are also common members of reef communities, where ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ophiacanthidae Ophiacanthidae is a family of brittle stars. Axel Vilhelm Ljungman circumscribed this taxon in 1867; he initially named the subfamily Ophiacanthinae within the family Amphiuridae. Gordon L. J. Paterson promoted its rank to family in 1985. , genera include: * '' Ophiacantha'' * ''Ophiohamus ''Ophiohamus'' is a genus of brittle stars in the family Ophiacanthidae from New Caledonia. Timothy D. O'Hara and Sabine Stöhr circumscribed In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through a ...'' * '' Brezinacantha'' References Ophiacanthida Echinoderm families Extant Early Cretaceous first appearances {{ophiuroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ophiojuridae ''Ophiojura'' is a genus of brittle star in its own family, Ophiojuridae. It has only one known species, ''Ophiojura exbodi'', collected by the EXBODI expedition from Banc Durand seamount off New Caledonia in 2011 at a depth of . The prefix 'Ophio' comes form the Ancient Greek word for serpent, and 'jura' is derived from the Jura Mountains, which lent its name to the Jurassic period. ''Ophiojura exbodi'' has eight arms, each long and bearing rows of sharp teeth leading to its multitude of jaws, which are also toothed. DNA and fossil evidence shows that it diverged from its nearest relatives 160–200 million years ago, with the best estimate 182 Ma, from the Early Jurassic to the Late Triassic. The following cladogram A cladogram (from Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an evolutionary tree because it does not show how ancestors are related to ... shows '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ophiomyxidae Ophiomyxidae is a family of echinoderms belonging to the order Ophiacanthida Ophiacanthida is an order of echinoderms belonging to the class Ophiuroidea. Families: * Ophiodermatina Ljungman, 1867 Ophiodermatidae Ophiomyxidae Ophiopezidae Ophiocomidae Ophiocomidae are a family of brittle stars of the subo .... Genera Genera: * '' Astrogymnotes'' * '' Neoplax'' Bell, 1884 * '' Ophiarachna'' Müller & Troschel, 1842 References Ophiacanthida Echinoderm families {{Ophiuroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ophiocomidae Ophiocomidae are a family of brittle stars of the suborder Ophiurina. Systematics and phylogeny Ophiocomidae has been placed (along with Ophionereididae) to the superfamily Ophiocomidea and infraorder Gnathophiurina or suborder Gnathophiurina in different classifications. Genera The following genera are included in the family according to the World Register of Marine Species (WoRMS):Ophiocomidae World Register of Marine Species. Retrieved 2011-08-30. * Subfamily Ophiocominae Genus '' Clarkcoma'' Devaney, 1970 Genus '' Ophiarthrum'' Peters, 1851 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Echinoderm An echinoderm () is any member of the phylum Echinodermata (). The adults are recognisable by their (usually five-point) radial symmetry, and include starfish, brittle stars, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or "stone lilies". Adult echinoderms are found on the sea bed at every ocean depth, from the intertidal zone to the abyssal zone. The phylum contains about 7,000 living species, making it the second-largest grouping of deuterostomes, after the chordates. Echinoderms are the largest entirely marine phylum. The first definitive echinoderms appeared near the start of the Cambrian. The echinoderms are important both ecologically and geologically. Ecologically, there are few other groupings so abundant in the biotic desert of the deep sea, as well as shallower oceans. Most echinoderms are able to reproduce asexually and regenerate tissue, organs, and limbs; in some cases, they can undergo complete regeneration from a single limb. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ophiodermatidae Ophiodermatidae are a family of brittle stars in the suborder Ophiurina. Systematics and phylogeny Some fossils date as far back as the Changhsingian age, late in the Permian period. The family includes the following living genera: * '' Bathypectinura'' * '' Cryptopelta'' * '' Diopederma'' * '' Distichophis'' * '' Ophiarachna'' * ''Ophiarachnella'' * '' Ophiochaeta'' * '' Ophiochasma'' * '' Ophioclastus'' * '' Ophioconis'' * ''Ophioconus'' (accepted as '' Ophioconis'') * '' Ophiocormus'' * '' Ophiocryptus'' * '' Ophioderma'' * '' Ophiodyscrita'' * '' Ophioncus'' * '' Ophiopaepale'' * '' Ophiopeza'' * ''Ophiopezella'' (accepted as '' Ophiopeza'') * '' Ophiopinax'' * ''Ophiopsammus'' * '' Ophiostegastus'' * '' Ophiurochaeta'' * '' Pectinura'' * '' Schizoderma'' * ''Toporkovia'' (accepted as ''Ophiolimna ''Ophiolimna'' is a genus of brittle stars. References * Thuy B, Gale AS, Kroh A, Kucera M, Numberger-Thuy LD, Reich M, et al. (2012) Ancient Origin of the Modern Deep-Sea Faun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]