Paratrichodorus

Paratrichodorus
Scientific classification
Kingdom: Animalia
Phylum: Nematoda
Class: Enoplea
Subclass: Enoplia
Order: Triplonchida
Suborder: Diphtherophorina
Superfamily: Diphtherophoroidea
Family: Trichodoridae
Genus: Paratrichodorus
Siddiqi, 1974[1]
Type species
Paratrichodorus tunisiensis Siddiqi
Species

Paratrichodorus is a genus of terrestrial root feeding (stubby-root) nematodes in the Trichodoridae family (trichorids), being one of five genera.[2] They are economically important plant parasites and virus vectors.[3] The females are didelphic (two genital tracts), and are distributed worldwide.[4]

Taxonomy

Historically, Trichodorus formed the only genus in the Trichodoridae family. Then Trichodorus was split into two genera in 1974 by Siddiqi,[1] Trichodorus and Paratrichodorus. The genus, which is the second largest in the family consists of 34 species.[4] Siddiqi based the separation on the position of the gland nuclei and the type of pharyngo-intestinal junction.

Subdivision

Using the same characteristics as those establishing the genus, Siddiqi described three subgenera, Paratrichodorus, Atlantadorus and Nanidorus, but Decraemer did not support the validity of this.[5] While the latter approach has not been accepted by some authorities,[5] Siddiqi elevated them to genus status in 1980,[6][7] an approach that few other authors have followed,[8] but maintained by that author,[9] and now receiving some support from modern molecular approaches to taxonomy. At least in the case of Nanidorus, phylogenetic analysis has supported its recognition as a separate genus, although clustering with Trichodorus rather than its parent Paratrichodorus.[8][10]

Plant pathology

Trichorids became of interest in 1951.[11] At that time Trichodorus christie (=Paratrichodorus minor) was recognised as a pest of crops in Florida.[12]

References

  1. 1.0 1.1 Siddiqi, M.R. (1974). "Systematics of the genus Trichodorus Cobb, 1913 (Nematoda: Dorylaimida), with descriptions of three new species". Nematologica 19: 259–278.
  2. Order Triplochida: Paratrichodorus Nemaplex: Nematode-Plant Expert Information System. University of California, Davis. Version October 9, 2012.
  3. Decraemer 1995.
  4. 4.0 4.1 Wilfrida Decraemer and R. T. Robbins. The Who, What and Where of Longidoridae and Trichodoridae. J Nematol v.39(4); 2007 Dec PMC2586508
  5. 5.0 5.1 Decraemer, W. 1980. Systematics of the Trichodoridae (Nematoda) with keys to their species. Revue. Nematol. 3(1): 81-99.
  6. SIDDIQI, M.R. (1980). On the generic status of Atlantadorus Siddiqi, 1974 and Nanidorus Siddiqi, 1974 (Nematoda: Trichodoridae). Systematic Parasitology 1, 151-152.
  7. Decraemer 1995, p. 10.
  8. 8.0 8.1 Duarte et al. 2010.
  9. SIDDIQI, M.R. (2002). Ecuadorus equatorius gen. n., sp. and Nanidorus mexicanus sp. n. (Nematoda: Trichodoridae). International Journal of Nematology 12, 197-202.
  10. Kumari & Subbotin 2012.
  11. CHRISTIE, J. R. & PERRY, V. G. (1951). Removing nematodes from soil. Proc. helm. Soc. Wasb. 18: 106-108.
  12. Decraemer 1995, p. 3.

Bibliography