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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.
Adenophorea or Aphasmidia was a class of nematodes (roundworms). It has been by and large abandoned by modern taxonomy , because there is strong evidence for it being a motley paraphyletic group of unrelated lineages of roundworms.
Nematoida is a clade of pseudocoelomate free living or parasitic animals.It consists of phyla Nematoda and Nematomorpha. [3] [4] The two groups share a number of features in common; the presence of a cloaca in both sexes, aflagellate sperm, and a cuticle made of collagen.
Nematodes are extracted from infected plant tissue and examined microscopically for distinguishing characteristics such as body and stylet, and tail morphology. Molecular methods for identifying Ditylenchus destructor (especially in distinguishing from other Ditylenchus species) include PCRs (polymerase chain reactions) to find restriction ...
Spirurida falls under the phylum Nematoda class Chromadorea and order Spirurida. They are characterized by their elongated, cylindrical bodies and unsegmented structure. Like all nematodes, they have neither a circulatory nor a respiratory system. Some Spirurida, like the genus Gongylonema, can cause disease in humans.
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.
Ecdysozoa (/ ˌ ɛ k d ɪ s oʊ ˈ z oʊ ə /) is a group of protostome animals, [8] including Arthropoda (insects, chelicerata (including arachnids), crustaceans, and myriapods), Nematoda, and several smaller phyla.
Hoplolaimus is a genus of nematodes known commonly as lance nematodes. [1] They are parasites of plants, and three species are pests of agricultural crops. [2] These nematodes are usually about 1 to 1.5 millimeters long; [1] some reach 2 millimeters. [2] They have large stylets with knobs shaped like anchors or tulips.