Helicotylenchus
Encyclopedia
Helicotylenchus is a genus of nematodes in the family Hoplolaimidae
Hoplolaimidae
Hoplolaimidae is a family of plant pathogenic nematodes. It has two subfamilies, Hoplolaiminae and Rotylenchulinae. Typically hoplolaimids are ecto- or semi endoparasites of higher plants.-Type subfamily :Hoplolaiminae Filip'ev, 1934....

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Diagnosis

Hoplolaimidae
Hoplolaimidae
Hoplolaimidae is a family of plant pathogenic nematodes. It has two subfamilies, Hoplolaiminae and Rotylenchulinae. Typically hoplolaimids are ecto- or semi endoparasites of higher plants.-Type subfamily :Hoplolaiminae Filip'ev, 1934....

. Female : Body vermiform, spiral to straight. Labial region continuous to slightly offset, rounded or anteriorly flattened, generally annulated but never longitudinally striated; anterior lip annulus generally not divided into sectors, with elongate amphid spertures (SEM). Rarely faint or marked lip sectors are present. Lateral field with four lines. Phasmids small, near anus; cephalids and caudalid present. Tail 1 to 2½ body diameters long, typically more curved dorsally, with or without a terminal ventral process, sometimes rounded. Stylet and labial framework averagesized. Dorsal gland opening from 6 to 16 µm from stylet base. Median bulb rounded with average-sized valve. Glands overlap intestine dorsally and ventrally, all three glands of about the same length. Two genital branches, the posterior one sometimes degenerated or reduced to a PUS. Epiptygma present but folded inwards, into the vagina. Vulval flaps present, inconspicuous. Male : Slight secondary sexual dimorphism seen in smaller anterior end. Caudal alae enveloping tail end.

Species

  • Helicotylenchus canadensis Waseem, 1961
  • Helicotylenchus depressus Yeates, 1976
  • Helicotylenchus dihystera
    Helicotylenchus dihystera
    Helicotylenchus dihystera is a plant pathogenic nematode. It is known to inhabit sugarcane, rice, potatoes, corn, peanut, millet, sorghum, forest trees, and banana.- External links :*...

    (Cobb, 1893) Sher, 1961
  • Helicotylenchus labiatus
  • Helicotylenchus multicinctus
    Helicotylenchus multicinctus
    Helicotylenchus multicinctus is a plant pathogenic nematode.- External links :*...

    (Cobb, 1893) Golden, 1956
  • Helicotylenchus pseudorobustus
  • Helicotylenchus varicaudatus
  • Helicotylenchus vulgaris Yuen, 1964


See complete list in http://genisys.prd.fr/nemaid.html
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