Steinernematidae
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Steinernematidae
The Steinernematidae are a family of nematodes in the order Rhabditida. Nematodes of the genus ''Steinernema'' are obligate insect parasites that inhabit soil. ''Xenorhabdus'' bacteria occupy nematode insecticide and synergistically kill, digest, and consume insect hosts. Together with ''Heterorhabditis'', ''Caenorhabditis'', ''Rhabditis ''Rhabditis'' is a genus of nematodes in the family Rhabditidae. ; Names brought to synonymy: ''Rhabditis (Caenorhabditis)'' Osche, 1952 is a synonym for ''Caenorhabditis ''Caenorhabditis'' is a genus of nematodes which live in bacteria-ric ...'', '' Pelodera'', '' Strongyloides'', '' Bursilla'', '' Cruznema'', and '' Panagrellus'', ''Sterinernema'' belongs to the order Rhabditida. References {{Taxonbar, from=Q18558530 Rhabditida Nematode families ...
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Steinernema
Steinernema is a genus of nematodes in the family of Steinernematidae. The genus ''Steinernema'' is named after the nematologist Gotthold Steiner. Life cycle Species form symbiotic relationships with ''Xenorhabdus'' and ''Photorhabdus'' bacteria. The free-living third stage juvenile, termed a dauer juvenile, enters its insect hosts through natural openings, such as the mouth, anus, and spiracles. Bacterial cells from the intestines are regurgitated into the insect. The insect hemolymph provides a rich medium for the bacterial cells which grow, releasing toxins and exoenzymes, causing the insect host to die from septicemia. The bacteria also produce other compounds to protect the insect from other microbes in the soil. The nematode moves out of its developmentally arrested third, nonfeeding stage, triggered by either bacterial or insect food signals. The nematodes feed on the bacteria and moult to the fourth stage, reaching adulthood within a few days. with separate male a ...
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Nematode
The nematodes ( or grc-gre, Νηματώδη; la, Nematoda) or roundworms constitute the phylum Nematoda (also called Nemathelminthes), with plant- parasitic nematodes also known as eelworms. They are a diverse animal phylum inhabiting a broad range of environments. Less formally, they are categorized as Helminths, but are taxonomically classified along with arthropods, tardigrades and other moulting animals in the clade Ecdysozoa, and unlike flatworms, have tubular digestive systems with openings at both ends. Like tardigrades, they have a reduced number of Hox genes, but their sister phylum Nematomorpha has kept the ancestral protostome Hox genotype, which shows that the reduction has occurred within the nematode phylum. Nematode species can be difficult to distinguish from one another. Consequently, estimates of the number of nematode species described to date vary by author and may change rapidly over time. A 2013 survey of animal biodiversity published in the mega ...
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Rhabditida
Rhabditida is an order of free-living, zooparasitic, and phytoparasitic microbivorous nematodes living in soil. The Cephalobidae, Panagrolaimidae, Steinernematidae, and Strongyloididae seem to be closer to the Tylenchia, regardless of whether these are merged with the Rhabditia or not.Tree of Life Web Project (2002b)Nematoda Version of 2002-JAN-01. Retrieved 2008-NOV-02. Families Rhabditida * Myolaimina **''Incertae sedis'' *** Myolaimoidea ****Myolaimidae *Rhabditina ** Bunonematomorpha *** Bunonematoidea ****Bunonematidae ** Diplogasteromorpha *** Cylindrocorporoidea ****Cylindrocorporidae *** Diplogasteroidea ****Cephalobiidae ****Diplogasteridae ****Diplogasteroididae ** Rhabditomorpha *** Mesorhabditoidea ****Peloderidae *** Rhabditoidea ****Rhabditidae * Spirurina ** Ascaridomorpha *** Ascaridoidea **** Acanthocheilidae ****Anisakidae ****Ascarididae **** Heterocheilidae **** Raphidascarididae *** Cosmocercoidea **** Atractidae **** Kathlaniidae *** Seuratoidea **** Cu ...
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Heterorhabditis
''Heterorhabditis'' is a genus of nematodes belonging to the order Rhabditida. All species of this genus are obligate parasites of insects, and some are used as biological control agents for the control of pest insects. ''Heterorhabditis'' nematodes are hosts for the '' Photorhabdus'' bacterial symbiont. Species The recognized species in this genus are: * ''Heterorhabditis amazonensis'' Andaló, Nguyen & Moino, 2007 * ''Heterorhabditis bacteriophora'' Poinar, 1976 * ''Heterorhabditis baujardi ''Heterorhabditis'' is a genus of nematodes belonging to the order Rhabditida. All species of this genus are obligate parasites of insects, and some are used as biological control agents for the control of pest insects. ''Heterorhabditis'' nemat ...'' Phan, Subbotin, Nguyen & Moens, 2003 * '' Heterorhabditis downesi'' Stock, Griffin & Burnell, 2002 * '' Heterorhabditis floridensis'' Nguyen, Gozel, Koppenhöfer & Adams, 2006 * '' Heterorhabditis georgiana'' Nguyen, Shapiro-Ilan and Mbata ...
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Caenorhabditis
''Caenorhabditis'' is a genus of nematodes which live in bacteria-rich environments like compost piles, decaying dead animals and rotting fruit. The name comes from Greek: caeno- (καινός (caenos) = new, recent); rhabditis = rod-like (ῥάβδος (rhabdos) = rod, wand). In 1900, Maupas initially named the species '' Rhabditis elegans'', Osche placed it in the subgenus ''Caenorhabditis'' in 1952, and in 1955, Dougherty raised ''Caenorhabditis'' to the status of genus. The genus ''Caenorhabditis'' contains the noted model organism ''Caenorhabditis elegans'' and several other species for which a genome sequence is either available or currently being determined. The two most-studied species in this genus (''C. elegans'' and ''C. briggsae'') are both androdioecious (they have male and hermaphrodite sexes) whereas most other species are gonochoristic (they have male and female sexes). ''C. elegans'' is the type species of the genus. Ecology ''Caenorhabditis'' occupy various ...
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Rhabditis
''Rhabditis'' is a genus of nematodes in the family Rhabditidae. ; Names brought to synonymy: ''Rhabditis (Caenorhabditis)'' Osche, 1952 is a synonym for ''Caenorhabditis ''Caenorhabditis'' is a genus of nematodes which live in bacteria-rich environments like compost piles, decaying dead animals and rotting fruit. The name comes from Greek: caeno- (καινός (caenos) = new, recent); rhabditis = rod-like (ῥά ...'' Dougherty, 1955 Species *'' Rhabditis aberrans'' *'' Rhabditis marina'' *'' Rhabditis maxima'' *'' Rhabditis necromena'' *'' Rhabditis sylvatica'' *'' Rhabditis terricola'' References External links * Rhabditidae Rhabditida genera {{Rhabditida-stub ...
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Pelodera
''Pelodera'' is a genus of nematodes belonging to the family Rhabditidae The Rhabditidae are a family of nematodes which includes the model organism ''Caenorhabditis elegans''. Genera ''Bursilla'' *''Bursilla monhysteria'' (Butschli, 1873) ''Caenorhabditis'' *''Caenorhabditis brenneri'' Sudhaus & Kiontke, 2007 *' .... The species of this genus are found in Europe and Africa. Species: *'' Pelodera aligarhensis'' *'' Pelodera chitwoodi'' *'' Pelodera conica'' *'' Pelodera kolbi'' *'' Pelodera litoralis'' *'' Pelodera operosa'' *'' Pelodera par'' *'' Pelodera punctata'' *'' Pelodera scrofulata'' *'' Pelodera serrata'' *'' Pelodera strongyloides'' *'' Pelodera teres'' *'' Pelodera voelki'' References {{Taxonbar, from=Q5267225 Nematodes ...
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Strongyloides
''Strongyloides'' (from Greek ''strongylos'', round, + ''eidos'', resemblance), anguillula, or threadworm is a genus of small nematode parasites, belonging to the family Strongylidae, commonly found in the small intestine of mammals (particularly ruminants), that are characterized by an unusual lifecycle that involves one or several generations of free-living adult worms. Human infection, strongyloidiasis, is caused by * ''Strongyloides stercoralis'', widespread in all tropical regions * '' Strongyloides fuelleborni'', a parasite of primates in African and Asian tropics and of humans in African tropics and New Guinea * '' Strongyloides papillosus,'' found in cattle, pigs, sheep, goats, rabbits, and rats * '' Strongyloides ransomi,'' found in pigs * '' Strongyloides ratti'', found in rats *'' Strongyloides myopotami'', found in coypu (nutria), causes dermatitis similar to strongyloidiasis. The condition is also called nutria itch. Treatment for strongyloides infection is iverm ...
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Bursilla
''Mesorhabditis'' is a genus of nematodes. Species in the genus ''Mesorhabditis'' exhibit an unusual form of parthenogenesis Parthenogenesis (; from the Greek grc, παρθένος, translit=parthénos, lit=virgin, label=none + grc, γένεσις, translit=génesis, lit=creation, label=none) is a natural form of asexual reproduction in which growth and developmen ..., in which sperm-producing males copulate with females, but the sperm do not fuse with the ovum. Contact with the sperm is essential for the ovum to begin dividing, but because there is no fusion of the cells, the male contributes no genetic material to the offspring, which are essentially clones of the female. References * Problems in New Zealand mushroom production associated with bacterial feeding nematodes (Mesorhabditis sp.). FR Sanderson, JW Marshall, GE Ovenden, HM Stengs - … , 1981/edited by NG Nair, AD …, 1981 * Systematik, Phylogenie und Okologie der holzbewohnenden Nematoden Gruppe Rhabdit ...
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Panagrellus
''Panagrellus'' is a genus of nematodes belonging to the family Panagrolaimidae. The species of this genus are found in Northern America. Species: *'' Panagrellus dorsobidentata'' *'' Panagrellus dubius'' *'' Panagrellus filiformis'' *'' Panagrellus ludwigi'' *'' Panagrellus nepenthicola'' *'' Panagrellus pycnus'' *'' Panagrellus redividus'' *'' Panagrellus redivivoides'' *''Panagrellus redivivus The free-living nematode ''Panagrellus redivivus'' (sour paste nematode, or beer mat nematode from its occurrence in constantly moist felt beer mats), is known to many aquarium enthusiasts and fish keepers as the microworm. It is a tiny roundwor ...'' *'' Panagrellus ulmi'' *'' Panagrellus ventrodentatus'' References {{Taxonbar, from=Q5304577 Nematodes ...
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