.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 arcuate when heatrelaxed.
- Cuticle coarsely annulated, annuli 0.8-0.9 μm wide at mid-body
with zigzag margins
- Lateral field prominent, marked by a single longitudinal
ridge with smooth margins
- Cephalic region continuous body contour, hemispherical, finely
striated, with well-developed protuberant labial plate appearing as
a small disc-like structure.
- Amphidial apertures crescent-shaped open pores .
- Stylet thin and weak, conus 29-41% of its total length, with
rounded and slightly posteriorly directed knobs.
- Dorsal esophageal gland orifice close to stylet knobs.
- Procorpus slender, metacorpus oval with moderately developed
valve, isthmus elongate, postcorpus pyriform, cardia discoid.
- Excretory pore at level with anterior part of pharyngeal bulb,
- Reproductive system monodelphic-prodelphic,
- Ovary outstretched, oocytes arranged in single row, oviduct not
clearly discernible,
- Spermatheca filled with spheroid sperm cells, crustaformeria
distinct, its cell arrangement not clearly seen,
- Post-uterine sac short, vagina with thin wall, straight or
slightly anteriorly inclined, vulva a transverse slit without flap.
- Tail conoid, gradually tapering, with finely pointed tip,
sometimes appearing to have a short mucron with several fine
bristles on tip.
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Males:
- Rare but considered sexually functional (sperm cells observed
inside spermatheca of female).
- General morphology similar to that of female except for slightly
shorter body.
- Cephalic region hemispherical and similar to that of female.
- Stylet thin, with rounded to slightly posteriorly sloping knobs.
- Procorpus cylindrical, median bulb oval with moderately
developed valve, isthmus slender and postcorpus bulb pyriform.
- Testis single and outstretched. Spermatocytes in two rows after
germinal zone, vas deferens full of spheroid sperm cells.
- Spicules slender, slightly ventrally arcuate.
- Gubernaculum trough-shaped. Cloacal lips projecting and forming
a short, posteriorly directed penial tube.
- Bursa absent.
- Tail similar to that of female.
Ref. Panahandeh et al., 2019
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