Cucullitylenchus amuzonensis A = anterior
portion of male, lateral view; B = cephalic region of female, sublateral
view; C = cephalic region of female, dorso-ventral view; D = female
gonad; E = posterior portion of male; F = whole nematode, female; G =
whole nematode, male. (from Huang and Raski, 1986)
Refer to subfamily diagnosis (Tylenchinae).
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Female
- Body slender, delicate, tapers gradually posterior to vulva,
more sharply after anus, ending in filiform tail.
- Viewed laterally, lip region truncate with small oral
depression.
- Lip region markedly set-off. Oral opening centrally
located, traces of oral papillae barely visible. Viewed laterally,
lip region truncate with small oral depression.
- Cephalic framework weak, obscure.
- Body annuli delicate but distinct, less than 1 um.
- Stylet weak, obscure in most cases. Stylet cone appears to be
shorter than shaft, basal knobs of stylet moderately developed.
- DEGO immediately behind stylet basal knobs.
- Metacorpus oval, long, weakly developed.
- Esophageal glands symmetrically arranged, bulb-like, not
overlapping intestine. Isthmus thin.
- Lateral field commences at anterior end of esophageal region,
ends beyond anus, two clear lines in most places, except where
one or two extra lines may appear in middle of field.
- Vulva slightly elevated, without lateral membranes.
- Gonad monodelphic, prodelphic.
- Spermatheca not set-off, oval, oblong or oblong with
constrictions in middle, appearing as two or sometimes three
spermathecae.
- Uterine cells arranged in four columns.
- Post-uterine sac less than one vulval body width. Anus obscure.
- Tai1 long, filiform, about 7-10 x anal body width.
Male :
- Similar to female except sexual characteristics.
- Cloaca1 opening cone-shaped, elevated.
- Caudal alae very low, only slightly higher
than cloaca1 cone.
Ref Huang and Raski, 1986
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