Dorylaimia

Dorylaimia is a subclass of nematodes.

Dorylaimia
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Nematoda
Class: Enoplea
Subclass: Dorylaimia
Inglis, 1983
Orders

Description

In general, members of subclass Dorylaimia exhibit a great diversity of terrestrial and freshwater species, most of which are large predators or omnivorous free-living species. Some are plant parasites, whereas others are animal parasites (Trichinellida and Mermithida). No members of the Dorylaimia are found in marine habitats. Dorylaimia bear an odontostyle, a protrusible, hollow, needlelike tooth for puncturing and emptying food items.

Taxonomy

Phylogenetic analysis of phylum Nematoda suggests three distinct basal clades, the dorylaims, enoplids, and chromadorids.[1] These represent Clades I, II and C+S of Blaxter (1998).[2] Of these, the first two appear to have sister clade status, allowing resolution into two classes, Enoplea and Chromadorea, and division of the former into two subclasses corresponding to Clades I and II respectively, the Enoplia and Dorylaimia. Nevertheless, the possibility remains that Dorylaimia will eventually be shown to be a distinct third class of nematodes.[3]

Subdivision

Phylogenetic analysis has resulted in a reorganization, with, for instance, moving the Triplonchida to subclass Enoplia.

Subclass Dorylaimia is divided into the following orders;

    • Order Dioctophymatida Baylis and Daubney, 1926
    • Order Dorylaimida Pearse, 1942
    • Order Isolaimida Cobb, 1920
    • Order Marimermithida Rubtzov, 1980
    • Order Mermithida Hyman, 1951
    • Order Mononchida Jairajpuri, 1969
    • Order Muspiceida Bain and Chabaud, 1959
    • Order Trichinellida Hall, 1916

References
  1. Lee 2010, p. 13.
  2. Blaxter 1998.
  3. Lee 2010, p. 18.

Further reading
  • Lee, Donald L, ed. (2010). The biology of nematodes. London: Taylor & Francis. ISBN 978-0415272117. Retrieved 16 December 2014.
  • Zhang, Zhi-Qiang, ed. (2011). Animal biodiversity : an outline of higher-level classification and survey of taxonomic richness. Auckland, N.Z.: Magnolia Press. ISBN 978-1869778491. Retrieved 15 December 2014.
  • Blaxter, Mark L.; De Ley, Paul; Garey, James R.; Liu, Leo X.; Scheldeman, Patsy; Vierstraete, Andy; Vanfleteren, Jacques R.; Mackey, Laura Y.; Dorris, Mark; Frisse, Linda M.; Vida, J. T.; Thomas, W. Kelley (5 March 1998). "A molecular evolutionary framework for the phylum Nematoda". Nature. 392 (6671): 71–75. doi:10.1038/32160. PMID 9510248. S2CID 4301939.
  • George O. Poinar Jr. The Evolutionary History of Nematodes: As Revealed in Stone, Amber and Mummies. 2011
  • Domingo Jiménez Guirado, Manuel Peralta Peralta, R. Peña Santiago. Nematoda: Mononchida, Dorylaimida I, Volume 30. 2007
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