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Echinasteridae
The Echinasteridae are a family (biology), family of starfish in the monotypic order (biology), order Spinulosida. The family includes eight genera and about 133 species found on the seabed in various habitats around the world. Taxonomy Echinasteridae contains eight genera and about 133 species. The two genera ''Echinaster'' and ''Henricia'' are the most speciose, forming species complexes. ''Echinaster'' has a largely tropical distribution and occurs in shallow seas including continental shelves, while ''Henricia'' is Cosmopolitan distribution, cosmopolitan, occurring mostly in cold waters, including polar habitats and abyssal locations. ''Aleutihenricia'' and ''Odontohenricia'' are native to the northeastern Pacific Ocean, in the vicinity of the Aleutian Islands. Characteristics Echinasterids are mostly five-armed starfish with thick but small discs, and long, slender, often cylindrical arms. The cuticle is covered on both the aboral (upper) and oral (lower) surfaces by a latti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinaster
''Echinaster'' is a well-studied and common genus of starfish containing ~30 species and is the second-largest genus found within the family Echinasteridae. The genera ''Henricia'' and ''Echinaster'' encompass 90% of all the species found within the family Echinasteridae. It contains 30 species, however the number of species in this genus is still debatable because of uncertainty within the genera. This genus is currently sub-divided into two sub-genera: ''Echinaster'' and ''Othilia'', evolutionary relationships between the sub-genera is not understood. ''Echinaster'' are found in the Pacific, Atlantic and Indian oceans, with most species being studied in the Gulf of Mexico and Brazil. The sub-genera ''Othilia'' is thought to encompass species mainly found in the Gulf of Mexico and Brazil. ''Echinaster'' is often one of the most studied species within the family Echinasteridae and is often used to find evolutionary relationships. Many species found within ''Echinaster'' are red, o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dictyaster
''Dictyaster'' is a small genus of starfish in the family Echinasteridae in the order Spinulosida. Species The following two species are recognised by the World Register of Marine Species: *'' Dictyaster xenophilus'' Wood-Mason & Alcock, 1891 *'' Dictyaster wood-masoni'' Alcock, 1893 (nomen nudum In Taxonomy (biology), taxonomy, a ''nomen nudum'' ('naked name'; plural ''nomina nuda'') is a designation which looks exactly like a scientific name of an organism, and may have originally been intended to be one, but it has not been published ..., Undescribed) References Echinasteridae Asteroidea genera {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henricia Sexradiata
''Henricia sexradiata'' is a species of starfish in the family Echinasteridae. It is native to the western Atlantic Ocean and the Gulf of Mexico. Distribution and habitat ''Henricia sexradiata'' is found in the tropical and semi-tropical western Atlantic Ocean. Its range extends from South Carolina to Jamaica, the Gulf of Mexico and Nicaragua. It is found on sandy and shelly bottoms at depths between . Ecology ''Henricia sexradiata'' can undergo a form of asexual reproduction Asexual reproduction is a type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes. The offspring that arise by asexual reproduction from either unicellular or multicellular organisms inherit the f ... by undergoing fission, with part of the disc and one or more arms breaking off; the missing parts of each section then regenerate to form two new individuals. References Echinasteridae Starfish described in 1881 {{asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henricia
''Henricia'' is a large genus of slender-armed sea stars belonging to the family Echinasteridae. It contains about fifty species. The sea stars from this genus are ciliary suspension-feeders, filtering phytoplankton. Species According to the World Register of Marine Species (WoRMS), 99 species belong to this genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ... Gallery Henricialeviuscula.jpg, '' Henricia leviuscula'' Starfish at Castle Rocks P7260899.JPG, '' Henricia ornata'' References Further reading * Catalogue of Life. (2008). Catalogue of Life. (2008). Retrieved May 8, 2010, from Species 2000: http://www.catalogueoflife.org/annual-checklist/2008/browse_taxa.php?selected_taxon=991569 * Clark, A.M. & Downey, M.E. (1992) Starfishes of the Atlantic. Chapman & Hall Ident ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aleutihenricia
''Aleutihenricia'' is a genus of starfish in the family Echinasteridae in the order Spinulosida. Species The following species are recognised by the World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ...: *'' Aleutihenricia beringiana'' (Djakonov, 1950) *'' Aleutihenricia derjungini'' (Djakonov, 1950) *'' Aleutihenricia federi'' Clark & Jewett, 2010 *'' Aleutihenricia reticulata'' (Hayashi, 1940) References Echinasteridae Asteroidea genera {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Odontohenricia
''Odontohenricia'' is a genus of starfish in the family Echinasteridae The Echinasteridae are a family (biology), family of starfish in the monotypic order (biology), order Spinulosida. The family includes eight genera and about 133 species found on the seabed in various habitats around the world. Taxonomy Echinast .... Species The following species are recognised:- *'' Odontohenricia ahearnae'' Clark & Jewett, 2010 *'' Odontohenricia anarea'' O'Hara, 1998 *'' Odontohenricia aurantia'' Clark & Jewett, 2010 *'' Odontohenricia clarkae'' Rowe & Albertson, 1988 *'' Odontohenricia endeavouri'' Rowe & Albertson, 1988 *'' Odontohenricia fisheri'' Rowe & Albertson, 1988 *'' Odontohenricia hayashii'' Rowe & Albertson, 1988 *'' Odontohenricia violacea'' Clark & Jewett, 2010 References Echinasteridae Asteroidea genera {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinulosida
The Spinulosida are an order of sea stars containing at least 120 species in seven genera and one family. Spinulosids completely lack pedicellariae and have a delicate skeletal arrangement. Their name comes from the presence of numerous low spines on the aboral (upper) surface. No fossil spinulosids have yet been found. Taxonomy The following family is recognised by the World Register of Marine Species: * Echinasteridae The Echinasteridae are a family (biology), family of starfish in the monotypic order (biology), order Spinulosida. The family includes eight genera and about 133 species found on the seabed in various habitats around the world. Taxonomy Echinast ... Verrill, 1870 References Echinoderm orders {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinaster Luzonicus
''Echinaster luzonicus'', the Luzon sea star, is a species of starfish in the family Echinasteridae, found in shallow parts of the western Indo-Pacific region. It sometimes lives symbiotically with a copepod or a comb jelly, and is prone to shed its arms, which then regenerate into new individuals. Description ''Echinaster luzonicus'' is normally a six-armed starfish but is often rather asymmetrical in appearance because of its habit of shedding arms. It is somewhat variable in colouring, ranging from red to dark brown. Both these colour morphs were collected off Heron Island in the Great Barrier Reef, and individuals seemed able to change their colour from red to brown and back again, possibly as a response to the amount of ambient light they received. Distribution and habitat ''Echinaster luzonicus'' is found in the tropical and sub-tropical western Indo-Pacific region. Its range extending from Madagascar and the east coast of Africa to Northern Australia, Indonesia and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Filter Feeder
Filter feeders are aquatic animals that acquire nutrients by feeding on organic matters, food particles or smaller organisms (bacteria, microalgae and zooplanktons) suspended in water, typically by having the water pass over or through a specialized filtering organ that sieves out and/or traps solids. Filter feeders can play an important role in condensing biomass and removing excess nutrients (such as nitrogen and phosphate) from the local waterbody, and are therefore considered water-cleaning ecosystem engineers. They are also important in bioaccumulation and, as a result, as indicator organisms. Filter feeders can be sessile, planktonic, nektonic or even neustonic (in the case of the buoy barnacle) depending on the species and the niches they have evolved to occupy. Extant species that rely on such method of feeding encompass numerous phyla, including poriferans ( sponges), cnidarians (jellyfish, sea pens and corals), arthropods ( krill, mysids and barna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cilium
The cilium (: cilia; ; in Medieval Latin and in anatomy, ''cilium'') is a short hair-like membrane protrusion from many types of eukaryotic cell. (Cilia are absent in bacteria and archaea.) The cilium has the shape of a slender threadlike projection that extends from the surface of the much larger cell body. Eukaryotic flagella found on sperm cells and many protozoans have a similar structure to motile cilia that enables swimming through liquids; they are longer than cilia and have a different undulating motion. There are two major classes of cilia: ''motile'' and ''non-motile'' cilia, each with two subtypes, giving four types in all. A cell will typically have one primary cilium or many motile cilia. The structure of the cilium core, called the axoneme, determines the cilium class. Most motile cilia have a central pair of single microtubules surrounded by nine pairs of double microtubules called a 9+2 axoneme. Most non-motile cilia have a 9+0 axoneme that lacks the centr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zooplankton
Zooplankton are the heterotrophic component of the planktonic community (the " zoo-" prefix comes from ), having to consume other organisms to thrive. Plankton are aquatic organisms that are unable to swim effectively against currents. Consequently, they drift or are carried along by currents in the ocean, or by currents in seas, lakes or rivers. Zooplankton can be contrasted with phytoplankton (cyanobacteria and microalgae), which are the plant-like component of the plankton community (the " phyto-" prefix comes from , although taxonomically ''not'' plants). Zooplankton are heterotrophic (other-feeding), whereas phytoplankton are autotrophic (self-feeding), often generating biological energy and macromolecules through chlorophyllic carbon fixation using sunlightin other words, zooplankton cannot manufacture their own food, while phytoplankton can. As a result, zooplankton must acquire nutrients by feeding on other organisms such as phytoplankton, which are generally smaller t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scavenger
Scavengers are animals that consume Corpse decomposition, dead organisms that have died from causes other than predation or have been killed by other predators. While scavenging generally refers to carnivores feeding on carrion, it is also a herbivorous feeding behavior. Scavengers play an important role in the ecosystem by consuming dead animal and plant material. Decomposer, ''Decomposers'' and detritivores complete this process, by consuming the remains left by scavengers. Scavengers aid in overcoming fluctuations of food resources in the environment. The process and rate of scavenging is affected by both Biotic component, biotic and Abiotic component, abiotic factors, such as carcass size, habitat, temperature, and seasons. Etymology Scavenger is an alteration of ''scavager,'' from Middle English ''skawager'' meaning "customs collector", from ''skawage'' meaning "customs", from Old North French ''escauwage'' meaning "inspection", from ''schauwer'' meaning "to inspect", of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
