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Gnathiidae
The Gnathiidae are a family of isopod crustaceans. They occur in a wide range of depths, from the littoral zone to the deep sea. The adults are associated with sponges and may not feed. The juvenile form is known as a 'praniza', and it is a temporary parasite of marine fish. These forms are not larvae; ''Gnathiidae'' instead become parasitic during the manca stage. Mancae of the ''Gnathiidae'' closely resemble the adult form, however they lack the final pair of pereiopod The anatomy of a decapod consists of 20 body segments grouped into two main body parts: the cephalothorax and the pleon (abdomen). Each segment – often called a somite – may possess one pair of appendages, although in various groups these m ...s. Taxonomy in the family relies on male characters, such that females and juveniles cannot be reliably identified. The family contains 182 species, divided among the following genera: *'' Afrignathia'' Hadfield & Smit, 2008 *'' Bathygnathia'' Dollfus, 1901 *'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gnathia
''Gnathia'' is a genus of Isopoda, isopod crustaceans, containing the following species: *''Gnathia africana'' Barnard, 1914 *''Gnathia albescens'' Hansen, 1916 *''Gnathia alces'' Monod, 1926 *''Gnathia andrei'' Pires, 1996 *''Gnathia antarctica'' (Studer, 1883) *''Gnathia antonbruunae'' Kensley, Schotte & Poore, 2009 *''Gnathia arabica'' Schotte, 1995 *''Gnathia arctica'' Eupraxie Gurjanova, Gurjanova, 1929 *''Gnathia asperifrons'' Holdich & Harrison, 1980 *''Gnathia aureola'' Stebbing, 1900 *''Gnathia aureumaculosa'' Ferreiera, Smit, Grutter & Davies, 2009 *''Gnathia barnardi'' Smit & Basson, 2002 *''Gnathia beethoveni'' Paul & Menzies, 1971 *''Gnathia bengalensis'' Kumari, Hanumantha, Rao & Shyamasundari, 1993 *''Gnathia biorbis'' Holdich & Harrison, 1980 *''Gnathia brachyuropus'' Monod, 1926 *''Gnathia brucei'' George, 2003 *''Gnathia bungoensis'' Nunomura, 1982 *''Gnathia calamitosa'' Monod, 1926 *''Gnathia calmani'' Monod, 1926 *''Gnathia calsi'' Mueller, 1993 *''Gnathia cam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isopoda
Isopoda is an order of crustaceans. Members of this group are called isopods and include both aquatic species and terrestrial species such as woodlice. All have rigid, segmented exoskeletons, two pairs of antennae, seven pairs of jointed limbs on the thorax, and five pairs of branching appendages on the abdomen that are used in respiration. Females brood their young in a pouch under their thorax called the marsupium. Isopods have various feeding methods: some eat dead or decaying plant and animal matter, others are grazers or filter feeders, a few are predators, and some are internal or external parasites, mostly of fish. Aquatic species mostly live on the seabed or the bottom of freshwater bodies of water, but some taxa can swim for short distance. Terrestrial forms move around by crawling and tend to be found in cool, moist places. Some species are able to roll themselves into a ball as a defense mechanism or to conserve moisture like species in the family Armadilli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasitic Crustaceans
Parasitism is a Symbiosis, close relationship between species, where one organism, the parasite, lives (at least some of the time) on or inside another organism, the Host (biology), host, causing it some harm, and is Adaptation, adapted structurally to this way of life. The entomologist E. O. Wilson characterised parasites' way of feeding as "predators that eat prey in units of less than one". Parasites include single-celled protozoans such as the agents of malaria, sleeping sickness, and amoebic dysentery; animals such as hookworms, lice, mosquitoes, and vampire bats; fungi such as Armillaria mellea, honey fungus and the agents of ringworm; and plants such as mistletoe, dodder, and the Orobanchaceae, broomrapes. There are six major parasitic Behavioral ecology#Evolutionarily stable strategy, strategies of exploitation of animal hosts, namely parasitic castration, directly transmitted parasitism (by contact), wikt:trophic, trophicallytransmitted parasitism (by being eaten), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cymothoida
Cymothoida is a suborder of Isopoda, isopod crustaceans with a mostly Carnivore, carnivorous or Parasite, parasitic lifestyle. It contains more than 2,700 described species in four Taxonomic rank#Ranks in zoology, superfamilies. Members of the suborder are characterised by their specialised mouthparts which include a mandible with a tooth-like process which is adapted for cutting or slicing. Classification Cymothoida contains these superfamilies and families: *Superfamily Anthuroidea Leach, 1814 **Antheluridae Poore & Lew Ton, 1988 **Anthuridae Leach, 1814 **Expanathuridae Poore, 2001 **Hyssuridae Wägele, 1981 **Leptanthuridae Poore, 2001 **Paranthuridae Menzies & Glynn, 1968 *Superfamily Cymothooidea Leach, 1814 **Aegidae White, 1850 **Anuropidae Stebbing, 1893 **Barybrotidae Hansen, 1890 **Cirolanidae Dana, 1852 **Corallanidae Hansen, 1890 **Cymothoidae Leach, 1818 **Gnathiidae Leach, 1814 **Protognathiidae Wägele & Brandt, 1988 **Tridentellidae Bruce, 1984 *Infraorder Epica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urda (isopod)
Urda may refer to: * Urd (Norse mythology), of which Urda is an alternative spelling * 167 Urda, an asteroid * Urda (cheese), a type of cheese in the Balkans * Urda (anime), an anime about time travel and Nazis * Urda (journal), a Norwegian antiquities and history journal * Urda, Toledo, a Spanish municipality * Urda Arneberg (1929–2000), Norwegian actress * ''Urda'' (isopod), an extinct genus related to the family Gnathiidae The Gnathiidae are a family of isopod crustaceans. They occur in a wide range of depths, from the littoral zone to the deep sea. The adults are associated with sponges and may not feed. The juvenile form is known as a 'praniza', and it is a temp ... * U.R.D.A., a fictional terrorist organization in '' Crisis Zone'' {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasitism
Parasitism is a close relationship between species, where one organism, the parasite, lives (at least some of the time) on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The entomologist E. O. Wilson characterised parasites' way of feeding as "predators that eat prey in units of less than one". Parasites include single-celled protozoans such as the agents of malaria, sleeping sickness, and amoebic dysentery; animals such as hookworms, lice, mosquitoes, and vampire bats; fungi such as honey fungus and the agents of ringworm; and plants such as mistletoe, dodder, and the broomrapes. There are six major parasitic strategies of exploitation of animal hosts, namely parasitic castration, directly transmitted parasitism (by contact), trophicallytransmitted parasitism (by being eaten), vector-transmitted parasitism, parasitoidism, and micropredation. One major axis of classification concerns invasiveness: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manca
The manca (plural: ''mancae'') is the post-larval juvenile in some crustaceans. The term is derived from Latin ''mancus'', meaning "defective, imperfect." The manca stage is the defining characteristic of a clade called Mancoida which comprises all the members of the Peracarida except the Mysidacea and the Amphipoda. Mancae closely resemble the adult form, but for the absence of the last pair of pereiopods. In some isopods, specifically the family Gnathiidae, the manca stage is a parasite Parasitism is a Symbiosis, close relationship between species, where one organism, the parasite, lives (at least some of the time) on or inside another organism, the Host (biology), host, causing it some harm, and is Adaptation, adapted str ... of fish, and is also known as the praniza. References Crustaceans Developmental biology Larvae {{crustacean-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Théodore Monod
Théodore André Monod (9 April 1902 – 22 November 2000) was a French naturalist, humanist, scholar and explorer. Exploration Monod was educated at École alsacienne and obtained a doctorate in science from Sorbonne University in 1922."Theodore Monod, Sahara-Loving Naturalist, Dies at 98" nytimes.com. Retrieved 24 February 2023. Early in his career, Monod was made professor at the '''' and founded the '' [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By William Elford Leach
In biology, a taxon (back-formation from ''taxonomy''; : taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion, especially in the context of rank-based (" Linnaean") nomenclature (much less so under phylogenetic nomenclature). If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were presumably set forth in prehistoric times by hunter-gatherers, as suggested by the fairly sophisticated folk taxonomies. Much later, Aristotle, and later still ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
