Rev 12/18/24
Classification:
Tylenchida Tylenchina Tylenchoidea Tylenchidae Tylenchinae
Malenchus Andrassy, 1968
Synonyms: Neomalenchus Siddiqi, 1979
Besides the coarsely annulated cuticle and markedly tapering body posterior to the vulva, the offset lateral region with small sub-ridges, pouch-like amphidial fovea and vagina with swollen wall are considered important defining characters of the genus (Qing and Bert, 2017).
Ref: Geraert & Raski, (1987); Qing and Bert (2017); Qing et al. (2016).
Two subgenera may be considered: Malenchus (Malenchus) Andr�ssy, 1968 and Malenchus (Telomalenchus) Siddiqi, 2000. Subgenus Malenchus is characterized by a simple lateral field with around 12 or mode very fine lines only vivible by SEM (Qing et al. 2017),and amphidial openings anteriorly wider sinusoid slit, about three to five cephalic annuli long. Subgenus Telomalenchus has a lateral field with three or five bands and amphidial slits that are short and curved (Siddiqi 2000; Geraert 2008). The lateral dikes or flaps of the vulva also differs between the two subgenera (Geraert 2008).
Malenchus is the second-most speciose genus of the Tylenchidae amd is cosmopolitan in distribution (Qing and Bert, 2017; Qing et al., 2016).
Unknown, often found associated with decomposing litter, but under and around plants. M. bryophilus feeds on som plant roots (Khera and Zuckerman, 1963).
Malenchus bryophilus feeds on cabbage roots for a long period and on dill and alfalfa for a maximum period of 2.5 minutes. It does not feed on broccoli, cauliflower, kohlrabi, radish, carrot, tomato, lettuce, beet, rye grass and marigold (Khera and Zuckermann, 1963).
Geraert, E. 2008. The Tylenchidae of the World. Identification of the Family Tylenchidae (Nematoda). Ghent, Belgium, Akademia Press
Geraert & Raski, (1987) Rev. Nematol. 10(2):143-161.
Khera, S., Zuckermann, B.M. (1963). In vitro studies of host-parasite relationships of some plant-parasitic nematodes, Nematologica, 9, 1-6.
Pedram, M., Soleymanzadeh, M., Pourjam, E., Mobasserim, M. 2018. Observations on Malenchus geraerti n. sp. (Rhabditida: Tylenchidae), a morphological and molecular phylogenetic study. Zootaxa 4369:406-418.
Qing, X., Sanchez-Monge, A., Janssen, T., Couvreur, M. and Bert, W. 2016. Description of Malenchus sexlineatus n. sp., new records of three known species of Malenchus Andrassy, 1968 (Nematoda: Tylenchidae) and notes on amphidial aperture development. Nematology 18:155-174.
Qing, X., Bert, W. 2017. Redefinition of Genus Malenchus Andrassy, 1968 (Tylenchomorpha: Tylenchidae) with Additional Data on Ecology. J. Nematology 49:189-206.
Qing, X., Pereira, T.J., Slos, D., Couvreur, M. and Bert, W. 2018. A new species of Malenchus (Nematoda: Tylenchomorpha) with an updated phylogeny of the Tylenchidae. Nematology 0 (2018) 1-22. DOI 10.1163/15685411-0000317
Siddiqi, M.R. 2000. Tylenchida. Parasites of Plants and Insects, 2nd edition. Wallingford, UK, CAB International,