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Multivalvulida
Multivalvulida is an order of myxozoan. Families * Kudoidae ''Kudoa'' is a genus of Myxozoa and the only genus recognized within the monotypic family Kudoidae. There are approximately 100 species of ''Kudoa'' all of which parasitize on marine and estuarine fish. ''Kudoa'' are most commonly known and studi ... * Spinavaculidae * Trilosporidae ReferencesEncyclopedia of Life entry Myxosporea Cnidarian orders {{Myxozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myxozoa
Myxozoa (etymology: Greek: μύξα ''myxa'' "slime" or "mucus" + thematic vowel o + ζῷον ''zoon'' "animal") is a subphylum of aquatic cnidarian animals – all obligate parasites. It contains the smallest animals ever known to have lived. Over 2,180 species have been described and some estimates have suggested at least 30,000 undiscovered species. Many have a two-host lifecycle, involving a fish and an annelid worm or a bryozoan. The average size of a myxosporean spore usually ranges from 10 μm to 20 μm, whereas that of a malacosporean (a subclade of the Myxozoa) spore can be up to 2 mm. Myxozoans can live in both freshwater and marine habitats. Myxozoans are highly derived cnidarians that have undergone dramatic evolution from a free swimming, self-sufficient jellyfish-like creature into their current form of obligate parasites composed of very few cells – sometimes only a single cell. As myxozoans evolved into microscopic parasites, they lost many g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multivalvulida
Multivalvulida is an order of myxozoan. Families * Kudoidae ''Kudoa'' is a genus of Myxozoa and the only genus recognized within the monotypic family Kudoidae. There are approximately 100 species of ''Kudoa'' all of which parasitize on marine and estuarine fish. ''Kudoa'' are most commonly known and studi ... * Spinavaculidae * Trilosporidae ReferencesEncyclopedia of Life entry Myxosporea Cnidarian orders {{Myxozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kudoa Septempunctata
''Kudoa'' is a genus of Myxozoa and the only genus recognized within the monotypic family Kudoidae. There are approximately 100 species of ''Kudoa'' all of which parasitize on marine and estuarine fish. ''Kudoa'' are most commonly known and studied for the negative effects the genus has on commercial fishing and aquaculture industries. Description The genus ''Kudoa'' is identified by the possession of four or more shell valves composed of a fragile membrane and arranged in a quadrate or stellate pattern. The maximum number of shell valves in any described ''Kudoa'' species is 13. Each of these valves has a polar capsule. The genus ''Kudoa'' was originally part of the genus '' Chloromyxum'' because of the distribution of their polar capsules, however, it was later determined to be a separate genus. Each ''Kudoa'' has two sporoplasm cells, one enclosed by the other. Most ''Kudoa'' are histozoic parasites, with a few species being described as coelzoic. Some taxonomists questi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kudoidae
''Kudoa'' is a genus of Myxozoa and the only genus recognized within the monotypic family Kudoidae. There are approximately 100 species of ''Kudoa'' all of which parasitize on marine and estuarine fish. ''Kudoa'' are most commonly known and studied for the negative effects the genus has on commercial fishing and aquaculture industries. Description The genus ''Kudoa'' is identified by the possession of four or more shell valves composed of a fragile membrane and arranged in a quadrate or stellate pattern. The maximum number of shell valves in any described ''Kudoa'' species is 13. Each of these valves has a polar capsule. The genus ''Kudoa'' was originally part of the genus '' Chloromyxum'' because of the distribution of their polar capsules, however, it was later determined to be a separate genus. Each ''Kudoa'' has two sporoplasm cells, one enclosed by the other. Most ''Kudoa'' are histozoic parasites, with a few species being described as coelzoic. Some taxonomists question ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinavaculidae
Spinavaculidae is a family of cnidarians belonging to the order Multivalvulida Multivalvulida is an order of myxozoan. Families * Kudoidae ''Kudoa'' is a genus of Myxozoa and the only genus recognized within the monotypic family Kudoidae. There are approximately 100 species of ''Kudoa'' all of which parasitize on marin .... Genera: * '' Octospina'' Hsieh & Xiao, 1993 References Multivalvulida Cnidarian families {{Myxozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trilosporidae
Trilosporidae is a family of cnidarians belonging to the order Multivalvulida Multivalvulida is an order of myxozoan. Families * Kudoidae ''Kudoa'' is a genus of Myxozoa and the only genus recognized within the monotypic family Kudoidae. There are approximately 100 species of ''Kudoa'' all of which parasitize on marin .... Genera: * '' Trilospora'' Noble, 1939 * '' Unicapsula'' Davis, 1924 References Cnidarian families Multivalvulida {{Myxozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myxosporea
Myxosporea is a class of microscopic parasites, belonging to the Myxozoa clade within Cnidaria. They have a complex life cycle which comprises vegetative forms in two hosts, an aquatic invertebrate (generally an annelid but sometimes a bryozoan) and an ectothermic vertebrate, usually a fish. Each host releases a different type of spore. The two forms of spore are so different that until relatively recently they were treated as belonging to different classes within the Myxozoa. Taxonomic status The taxonomy of both actinosporeans and myxosporeans was originally based on spore morphology. In 1994 the phylum Myxozoa was redefined to solve the taxonomic and nomenclatural problems arising from the two-host life cycle of myxozoans. The distinction between the two previously recognised classes Actinosporea and Myxosporea disappeared and the class ''Actinosporea'' was suppressed, becoming a synonym of the class ''Myxosporea'' (Bütschli, 1881). The generic names of actinosporeans were r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Order (biology)
Order ( la, wikt:ordo#Latin, ordo) is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between Family_(biology), family and Class_(biology), class. In biological classification, the order is a taxonomic rank used in the classification of organisms and recognized by the nomenclature codes. An immediately higher rank, superorder, is sometimes added directly above order, with suborder directly beneath order. An order can also be defined as a group of related families. What does and does not belong to each order is determined by a taxonomist, as is whether a particular order should be recognized at all. Often there is no exact agreement, with different taxonomists each taking a different position. There are no hard rules that a taxonomist needs to follow in describing or recognizing an order. Some taxa are accepted almost universally, while others are recognized only rarely. The name of an order is usually written with a capital letter. Fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
