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.The absence of a bursa in males is one of the
distinguishing features of the genus Miculenchus.
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Refer to subfamily diagnosis (Tylenchinae).
Female:
- Body straight or slightly ventrally curved after fixing.
- Cuticle distinctly annulated, annuli 0.8-1.2 μm wide at
mid-body.
- Lateral field with two crenate incisures.
- Cephalic region continuous with body contour, elevated and
rounded, with very small protuberant labial plate and weak cephalic
framework.
- Stylet delicate, 6.0-7.5 μm long, conus 28-42% of its
total length, knobs small, rounded and slightly posteriorly
directed.
- Dorsal esophageal gland opening close to stylet knobs.
- Procorpus elongate, cylindrical, metacorpus oval, moderately
developed with distinct central valve.
- Isthmus slender and long,
- Postcorpus pyriform to pyriform-elongate.
- Excretory pore located at middle to posterior half of isthmus.
- Reproductive system monodelphic-prodelphic, occupying
18-24% of total body length.
- Ovary outstretched with oocytes arranged in single row.
- Spermatheca offset, rounded, filled with spheroid sperm.
- Crustaformeria quadricolumellate.
- Vagina straight, vulva a transverse slit lacking lateral
membranes.
- Post-uterine sac (PUS) short, 4-8 μm long.
- Tail conoid, gradually tapering to a sharp terminus
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Males:
- Common although less frequent than female, functional.
- General morphology similar to that of female.
- Cephalic region elevated with rounded end, similar to that of
female.
- Testis single, outstretched.
- Spermatocytes arranged in one row after germinal zone, vas
deferens filled with spheroid sperm cells.
- Spicules tylenchoid, slender, ventrally arcuate.
- Gubernaculum simple,
- Cloacal lips simple, not projecting.
- Bursa absent.
- Tail similar to that of female.
Ref. Panahandeh et al., 2019
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