Female:
- Large body large (1.8-2.7 mm), almost straight .
- Cuticle fiÂŽnely striated
- Lateral fiÂŽeld narrow, starting at end of procorpus and becoming
inconspicuous near anus.
- Mouth opening partly covered by six liplets each bearing a
labial papilla. Liplets continuous with six discrete lips separated
by shallow grooves.
- Four short cephalic setae, at base of subventral and subdorsal
lips.
- Amphid opening slit like, encircled by a round shallow incisure
and situated two discontinuous annuli posterior to setae.
- Stoma triradiate, relatively wide along full length . Lengths of
cheilostom, gymnostom and stegostom in ratio 1 : 1 : 2.
- Dorsal gland opening at base of projections in stegostom.
- Pharynx with a cylindrical corpus about 68% of length, a short
isthmus and an oval bulbus with transverse valves. Cardia well
developed.
- Nerve ring at transition of corpus-isthmus. Excretory pore
anterior to nerve ring, wide but difficult to see.
- Rectum long, with large sphincter cells at its beginning.
- Monodelphic, prodelphic,with reflexed ovary.
- Two opposing and offset spermatheca-like pouches present at
junction of oviduct and uterus.
- Vulva a transverse slit with overhanging anterior vulval
lip located at 75% of body length. Vagina with thickened walls and
surrounded by strong muscles.
- Prominent postvulval sac with anterior stalk and posterior
pouch.
- Anus a broad, curved slit in ventral view.
- Tail elongate-conical with ÂŽfine tip.
Male:
- General morphology similar to female but slightly shorter.
- Esophogeal region 20-25% of body length.
- Monorchic, reproductive tract occupying 50-75% of body length,
- Large granulated spermatocytes.
- Spicules massive, arcuate, each with complex angular manubrium
and well developed velum. Demarcation of shaft and velum strongly
sclerotised, spicule tip not divided.
- Gubernaculum with ventral triangularextension and prominent
crura which may protrude from cloacal aperture.
- Seven precloacal papillae, the first pair subventral on
cuticular sockets at about two anal body diam. anterior to cloaca,
second pair lateral, less than one anal body diam. before cloaca,
third pair subventral on cuticular sockets at level of precloacal
lip and one medioventral papilla located on higher socket at same
level as second precloacal pair.
- Four papilla pairs on tail:
- Tail elongate,conical, narrowing sharply at midpoint and
with ÂŽfine tail tip. No phasmids observed .
Ref: Bert et al., 2003
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