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Copepods
Copepods (; meaning "oar-feet") are a group of small crustaceans found in nearly every freshwater and saltwater habitat. Some species are planktonic (inhabiting sea waters), some are benthic (living on the ocean floor), a number of species have parasitic phases, and some continental species may live in limnoterrestrial habitats and other wet terrestrial places, such as swamps, under leaf fall in wet forests, bogs, springs, ephemeral ponds, and puddles, damp moss, or water-filled recesses (phytotelmata) of plants such as bromeliads and pitcher plants. Many live underground in marine and freshwater caves, sinkholes, or stream beds. Copepods are sometimes used as biodiversity indicators. As with other crustaceans, copepods have a larval form. For copepods, the egg hatches into a nauplius form, with a head and a tail but no true thorax or abdomen. The larva molts several times until it resembles the adult and then, after more molts, achieves adult development. The nauplius form is so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monstrilloida
Monstrilloida is an order of copepods with a cosmopolitan distribution in the world's oceans. The order contains a single family, Monstrillidae. The name of the first ever described genus ''Monstrilla'' is derived from latin, meaning "tiny monster", because the lack of usual diagnostic features of copepods puzzled early taxonomists. Description The family Monstrillidae is characterised by having a well-developed fourth pair of swimming legs, but a rudimentary or absent fifth pair. Adults have no oral appendages, and the mouth leads only to a short, blind pharynx. They also lack second antennae, but show large, multiramous and setaceous antennulae. These antennulae are rigid and anteriorly oriented. Females carry a long pair of spines to which the eggs are attached, while males have a "genital protuberance, which is provided with lappets"; in both sexes, the genitalia are very different from those of all other copepods. Some species have large, well-developed nauplius eyes, whil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclopoida
The Cyclopoida are an order of small crustaceans from the subclass Copepoda. Like many other copepods, members of Cyclopoida are small, planktonic animals living both in the sea and in freshwater habitats. They are capable of rapid movement. Their larval development is metamorphic, and the embryos are carried in paired or single sacs attached to first abdominal somite. Distinguishing features Cyclopoids are distinguished from other copepods by having first antennae shorter than the length of the head and thorax, and uniramous second antennae. The main joint lies between the fourth and fifth segments of the body. Taxonomy Cyclopoida contains 30 families: * Archinotodelphyidae Lang, 1949 * Ascidicolidae Thorell, 1859 * Botryllophilidae Sars G.O., 1921 * Buproridae Thorell, 1859 * Chitonophilidae Avdeev & Sirenko, 1991 * Chordeumiidae Boxshall, 1988 * Corallovexiidae Stock, 1975 * Cucumaricolidae Bouligand & Delamare-Deboutteville, 1959 * Cyclopettidae Martínez Arbizu, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mormonilloida
Mormonillidae is a family of planktonic marine copepod Copepods (; meaning "oar-feet") are a group of small crustaceans found in nearly every freshwater and saltwater habitat (ecology), habitat. Some species are planktonic (inhabiting sea waters), some are benthos, benthic (living on the ocean floor) ...s, the only member of the order Mormonilloida. There are five known species in two genera: *'' Mormonilla'' Giesbrecht, 1891 :*'' Mormonilla atlantica'' Wolfenden, 1905 :*'' Mormonilla phasma'' Giesbrecht, 1891 *'' Neomormonilla'' Ivanenko & Defaye, 2006 :*'' Neomormonilla extremata'' Ivanenko & Defaye, 2006 :*'' Neomormonilla minor'' (Giesbrecht, 1891) :*'' Neomormonilla polaris'' (G. O. Sars, 1900) References Copepods Crustacean families {{copepod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siphonostomatoida
Siphonostomatoida is an order of copepods, containing around 75% of all the copepods that parasitise fishes. Their success has been linked to their possession of siphon-like mandibles and of a "frontal filament" to aid attachment to their hosts. Most are marine, but a few live in fresh water. There are 40 recognised families: * Archidactylinidae Izawa, 1996 *Artotrogidae Brady, 1880 *Asterocheridae Giesbrecht, 1899 *Brychiopontiidae Humes, 1974 *Caligidae Burmeister, 1835 * Calverocheridae Stock, 1968 *Cancerillidae Giesbrecht, 1897 *Codobidae Boxshall & Ohtsuka, 2001 *Coralliomyzontidae Humes & Stock, 1991 * Dichelesthiidae Milne-Edwards, 1840 *Dichelinidae Boxshall & Ohtsuka, 2001 *Dinopontiidae Murnane, 1967 *Dirivultidae Humes & Dojiri, 1980 *Dissonidae Yamaguti, 1963 *Ecbathyriontidae Humes, 1987 *Entomolepididae Brady, 1899 *Eudactylinidae C. B. Wilson, 1932 * Hatschekiidae Kabata, 1979 * Hyponeoidae Heegaard, 1962 * Kroyeriidae Kabata, 1979 * Lernaeopodidae Milne-Edwards, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crustacean
Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods emerged deep in the Crustacean group, with the completed group referred to as Pancrustacea. Some crustaceans (Remipedia, Cephalocarida, Branchiopoda) are more closely related to insects and the other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese spider crab with a leg span of up to and a mass of . Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calanoida
Calanoida is an order of copepods, a group of arthropods commonly found as zooplankton. The order includes around 46 families with about 1800 species of both marine and freshwater copepods between them. Description Calanoids can be distinguished from other planktonic copepods by having first antennae at least half the length of the body and biramous second antennae. However, their most distinctive anatomical trait is the presence of a joint between the fifth and sixth body segments. The largest specimens reach long, but most do not exceed long. Classification Calanoida contains the following families, as well as the genus '' Microdisseta'' (which is currently ''incertae sedis''); * Acartiidae * Aetideidae * Arctokonstantinidae * Arietellidae * Augaptilidae * Bathypontiidae * Calanidae * Calocalanidae * Candaciidae * Centropagidae * Clausocalanidae * Diaixidae * Diaptomidae * Discoidae * Epacteriscidae * Eucalanidae * Euchaetidae * Fosshageniidae * Heterorhabdidae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canuelloida
Polyarthra is an order of copepods belonging to the class Copepoda Copepods (; meaning "oar-feet") are a group of small crustaceans found in nearly every freshwater and saltwater habitat. Some species are planktonic (inhabiting sea waters), some are benthic (living on the ocean floor), a number of species have p .... Taxonomy There are two families recognised in the order Polyarthra: * Canuellidae Lang, 1944 * Longipediidae Boeck, 1865 References Copepods {{Copepod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gelyelloida
''Gelyella'' is a genus of freshwater copepods which are "surrounded by mystery". They live in groundwater in karstic areas of southern France and western Switzerland. The two species are the only members of the family Gelyellidae and, although previously placed in the order Harpacticoida, a new order, Gelyelloida, was erected for this family alone. ''Gelyella'' shows some paedomorphosis, in which animals reach sexual maturity while still partly resembling juveniles. The adults are long with a nearly cylindrical body that tapers towards the rear. There are eleven body segments, the last of which is the length of the previous two segments combined. Species The first species of ''Gelyella'' was described in 1977 from material collected at Saint-Gély-du-Fesc, Hérault, France and given the name ''Gelyella droguei''. A second species was later collected from the Gorges de l'Areuse in the Swiss Jura, and named ''Gelyella monardi'' to mark the centenary of the birth of the Sw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Misophrioida
Misophrioida is an order of copepods, containing the following families: *Misophriidae Boxshall & Jaume, 2000 *Palpophriidae Boxshall & Jaume, 2000 *Speleophriidae Speleophriidae is a family of copepods, comprising seven genera. All are restricted to anchialine caves, with the exception of '' Archimisophria'', which is found in the hyperbenthos of the depths of the Atlantic Ocean The Atlantic Ocean ... Boxshall & Jaume, 2000 References Copepods Crustacean orders {{copepod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platycopioida
Platycopiidae is a family of copepods. Until the description of ''Nanocopia'' in 1988, it contained the single genus ''Platycopia''. It now contains four genera, three of which are monotypic; the exception is ''Platycopia'', with 8 species. Systematics The family Platycopiidae was erected by Georg Ossian Sars when he described the new species ''P. perplexa'', and included it in the order Calanoida. In 1948, Karl Georg Herman Lang erected a new suborder, Progymnoplea, for the family, and in 1985, Audun Fosshagen & Thomas Iliffe created the order Platycopioida to contain the Platycopiidae, initially placed alongside Calanoida in the superorder Gymnoplea. Most recently, Huys & Boxshall inferred that Platycopiidae was the earliest branching copepod lineage, making it the sister taxon to all other copepods; they therefore raised Progymnoplea to the rank of infraclass, to accommodate Platycopioida alone, with all other copepods being placed in the Neocopepoda. Members of the Platycop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crustacean Larvae
Crustaceans may pass through a number of larval and immature stages between hatching from their eggs and reaching their adult form. Each of the stages is separated by a moult, in which the hard exoskeleton is shed to allow the animal to grow. The larvae of crustaceans often bear little resemblance to the adult, and there are still cases where it is not known what larvae will grow into what adults. This is especially true of crustaceans which live as benthic adults (on the sea bed), more-so than where the larvae are planktonic, and thereby easily caught. Many crustacean larvae were not immediately recognised as larvae when they were discovered, and were described as new genera and species. The names of these genera have become generalised to cover specific larval stages across wide groups of crustaceans, such as ''zoea'' and ''nauplius''. Other terms described forms which are only found in particular groups, such as the ''glaucothoe'' of hermit crabs, or the ''phyllosoma'' of slippe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zoophyte
A zoophyte (animal-plant) is an organism thought to be intermediate between animals and plants, or an animal with plant-like attributes or appearance. In the 19th century they were reclassified as Radiata which included various taxa, a term superseded by Coelenterata referring more narrowly to the animal phyla Cnidaria (coral animals, true jellies, sea anemones, sea pens, and their allies) and Ctenophora (comb jellies). A group of strange creatures that exist somewhere on, or between, the boundaries of plants and animals kingdoms were the subject of considerable debate in the eighteenth century. Some naturalist believed that they were a blend of plant and animal; others naturalist considered entirely either plant or animal. An example is a sea anemone. The name is obsolete in modern science. Ancient and medieval to early modern era In Eastern cultures such as Ancient China fungi were classified as plants in the Traditional Chinese Medicine texts, and cordyceps, and in par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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