Nematomorpha
Phylum of parasitoid animals, horsehair worms / From Wikipedia, the free encyclopedia
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Nematomorpha (sometimes called Gordiacea, and commonly known as horsehair worms, hairsnakes,[1][2][3] or Gordian worms) are a phylum of parasitoid animals superficially similar to nematode worms in morphology, hence the name. Most species range in size from 50 to 100 millimetres (2.0 to 3.9 in), reaching 2 metres (79 in) in extreme cases, and 1 to 3 millimetres (0.039 to 0.118 in) in diameter. Horsehair worms can be discovered in damp areas, such as watering troughs, swimming pools, streams, puddles, and cisterns. The adult worms are free-living, but the larvae are parasitic on arthropods, such as beetles, cockroaches, mantises, orthopterans, and crustaceans.[4] About 351 freshwater species are known[5] and a conservative estimate suggests that there may be about 2000 freshwater species worldwide.[6] The name "Gordian" stems from the legendary Gordian knot. This relates to the fact that nematomorphs often coil themselves in tight balls that resemble knots.[7]
Nematomorpha | |
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Paragordius tricuspidatus | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Subkingdom: | Eumetazoa |
Clade: | ParaHoxozoa |
Clade: | Bilateria |
Clade: | Nephrozoa |
(unranked): | Protostomia |
Superphylum: | Ecdysozoa |
Clade: | Nematoida |
Phylum: | Nematomorpha Vejdovsky, 1886 |
Orders and families | |
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