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Female:
- Body gradually narrowing anteriorly; part of tail around
suckers strongly swollen.
- Head with 2 hooks, 9-10 um long, widely divergent blades, base
10 um long.
- Stoma opens in center of hook base.
centre of hook base. Amphid aperture slit-like, close to base of
hooks.
- Stoma reduced. Esophagus clavate with reduced muscular fibers,
and 3 large nuclei
in basal part. Nerve ring on central part of esophagus at level of
excretory pore.
- Large excretory cell with prominent nucleus; cutiulcrized duct
to pore.
- Monodelphic; spermatheca with spherical sperm at flexure in
ovary; ovary tip behind anus.
- Up to 10 fully formed eggs in uterus; eggshell with
tuberculate surface
- Suckers large, with superficial spot (60 um approx. diam.) of
spongy tissue; 2 thin fibres; behind suckers tail tapers gradually
Male:
- Cephalic hooks similar to female
- Monorchic, testis reflexed
- Lumina of vas deferens and intestine merge c. 30 um before
anus.
- No copulatory apparatus or sensillae;
- Suckers 50-60 um behind anus, longitudinally elongated
with aperture
15-20 um in diameter.
- Tail long, spindle-shaped tail, only slightly swollen at level
of sucker
Ref: Yeates and Spiridnov, 1006 |