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The nematodes (/ ˈ n ɛ m ə t oʊ d z / NEM-ə-tohdz or NEEM-; Ancient Greek: Νηματώδη; Latin: Nematoda), roundworms or eelworms constitute the phylum Nematoda. Species in the phylum inhabit a broad range of environments. Most species are free-living, feeding on microorganisms, but many are parasitic.
The orders are distinguished mainly by habitat type. [4] [3] Enoplida Filipjev, 1929 – nematodes of marine and brackish water habitat, carnivorous or feed on diatoms and other algaes; Triplonchida Cobb, 1920 – terrestrial nematodes, including some plant parasites; Trefusiida Lorenzen, 1981
List of Nematoda has 25,000 recorded species from the Nematode phylum. There are estimated to be a million. [1]
Enoplida is an order of nematodes. It is one of two orders in Enoplia, which is one of two subclasses in Class Enoplea. [1] [2] These nematodes are mostly free-living marine animals. [3] Most feed on diatoms and other algaes. [1]
Enoplea (enopleans) is a class, which with the classes Secernentea [1] and Chromadorea make up the phylum Nematoda in current taxonomy. [2] [3] [4] The Enoplea are considered to be a more ancestral group than the Chromadorea, and researchers have referred to its members as the "ancestrally diverged nematodes", compared to the "more recently diverged nematodes" of Chromadorea.
Tylenchidae is a family of nematodes. They are an important group of soil dwelling species that frequently contributes as much as 30% to the nematode species richness of soil samples. [2] They diverged relatively early on and many species pose little risk to economically important plant species. [2]
For example, if the vector is a skin-piercing fly such as a mosquito the microfilaria must enter the peripheral blood circulation, whereas species borne by skin-rasping flies such as Simuliidae [10] and skin-cutting flies such as Tabanidae tend to establish in hypodermal tissues. For obscure reasons, some such species actually undergo daily ...
The Chromadorea are a class of the roundworm phylum, Nematoda.They contain a single subclass (Chromadoria) and several orders.With such a redundant arrangement, the Chromadoria are liable to be divided if the orders are found to form several clades, or abandoned if they are found to constitute a single radiation.