Radopholus

Radopholus	Contents	Rev 10/16/2008
Burrowing Nematode	Classification	Hosts
	Morphology and Anatomy	Life Cycle
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Classification:

    Tylenchida
      Tylenchina
       Tylenchoidea
        Pratylenchidae
         Pratylenchinae
           Radopholus (Thorne, 1949)

    Synonyms:
           Radopholoides (de Guiran, 1967)
           Neoradopholus (Khan and Shakil, 1973)

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Morphology and Anatomy:

Female: Similar to Pratylenchus in general shape and size.

Secondary sexual dimorphism strongly marked.

Deirids absent.

Two female genital branches equally developed (diovarial, amphidelphic) or, more rarely, posterior branch more or less reduced, degenerated and nonfunctional.

Female lip area low, not offset; by SEM, lateral sectors narrow, but expanded posteriorly on succeeding lip annules; submedial sectors completely fused together and with the labial disc.

Esophageal glands in line, with long dorsal overlap of the intestine.

Esophago-intestinal valve not well developed.

Tail long (c'=2.4), tapering to terminus rounded or almost pointed.

Phasmids at mid-tail, or slightly anterior.

Males: Lips high, rounded, set-off; cephalic sclerotization weak,

Stylet reduced; basal knobs vestigial or absent.

Esophagus reduced.

Gubernaculum slightly protruding from cloaca.

Caudal alae subterminal or, more rarely, terminal.

Sperms usually rod-like.

Male with bursa.

[Ref: Luc, (1987) and H. Ferris.]