Rotylenchulus		Contents		Rev 09/14/2023
		Classification		Hosts
		Morphology and Anatomy		Life Cycle
Return to Rotylenchulus Menu		Economic Importance		Damage
		Distribution		Management
Return to Hoplolaimidae Menu		Feeding		References
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Classification:

      Tylenchina
       Tylenchoidea
        Hoplolaimidae
         Rotylenchulinae

          Rotylenchulus Linford and Oliveira, 1940

Type species of the genus: Rotylenchulus reniformis Linford and Oliveira, 1940
   

 Synonyms:
          Spirotylenchus (= Spyrotylenchus) (Lordello and Cesnik, 1958)
          Leiperotylenchus (Das, 1960)

The genus name, Rotylenchulus, was given by Linford and Oliveira because they thought that these nematodes were similar to the genus Rotylenchus.

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Morphology and Anatomy:

High intraspecific variability of morphological characteristics of immature females confounds microscopic identfication of species. Molecular characteristics provide important diagnostic tools (Van den Berg et al., 2016).

	Mature female swollen, kidney shaped; male vermiform. Lip region of immature female not offset from body contour Cephalic framework conspicuous. DEGO >1/2 stylet length posterior to styley knobs. Esophageal glands overlap intestine lateroventrally. Vulva >50% Female didelphic, amphidelphic. Eggs deposited in gelationous matrix Female tail >2x abd. Male with weak stylet and reduced esophagus with metacorpus indistinct; probably do not feed.. Caudal alae present, adanal. Ref: Dasgupta et al., 1968.
Mature female of Rotylenchulus borealis. Photo by Ulrich Zunke.
Body size range for the species of this genus in the database - Click:

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Distribution:

Mainly in tropical and subtropical areas.

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Economic Importance:

There are eleven species in the genus (Fortuner, 1987; van den Berg, 2016), but R. reniformis is considered the most economically important species of the group.

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Feeding:

 Semi-endoparasites of roots of herbaceous and woody plants.

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Hosts:

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Life Cycle:

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Damage:

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Management:

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References:

Dasgupta, D.R., Raski, D.J., Sher. S.A. 1968. A revision of the genus Rotylenchulus Linford & Oliveira, 1940 (Nematoda: Tylenchidae). Proccedings Helminth. Society Washington 35:169-192.

Fortuner, R. 1987. "A reappraisal of Tylenchina (Nemata). The family Hoplolaimidae Filip'ev 1934." Revue de Nematologie. 10:219-232.

Van den Berg, E., J.E. Palomares-Rius, N. Vovlas, L.R. Tiedt, P. Castillo, S.A. Subbotin. 2016. Morphological and molecular characterisation one new and several known species of the reniform nematode Rotylenchulus Linford & Oliviera, 1940 (Hoplolaimidae, Rotylenchulinae) and a phylogeny of the genus. Nematology18:67-107..

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Copyright © 1999 by Howard Ferris.
Revised: September 14, 2023.