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- Buccal cavity 1.0-1.2 cephalic body diam. (cbd) long, divided into
two chambers:
- Anterior buccal chamber 0.6-0.7 cbd. long, consisting of
cheilostome and anterior part of pharyngostome, surrounded by body
cuticle at the cheilostome level, funnel-shaped and sclerotized at
pharyngostome level,
- the posterior chamber corresponding to posterior part of
pharyngostome, is spherical in shape, less sclerotized than the anterior
chamber, and without denticles.
- Amphidial aperture circular,
- Ocelli (eye spots) paired, not present in all species, consisting of
translucent lens and red-violet pigment spot,, located dorsolaterally
and conspicuous in living nematodes.
- Pharynx muscular, gradually widened to posteriorly but without
terminal bulb. Cardia distinct
- Pore of secretory-excretory system at about 5.5 cbd from
anterior body.
- Tail elongated, conical, strongly tapering in anterior quarter
and then gradually tapering toward tip, about 12.5 cloacal body diam.
long or 25-31% of body length.
- Spinneret present at tail tip
Females:
- Monodelphic, prodelphic, ovary outstretched,
- Oviduct narrow and surrounded by wall of large cells.
- Uterus single, without post-vulval vaginal sac or gland-like
structure.
- Vulva located at 43-46% of body length from anterior end,
surrounded by thickened body cuticle.
- Vagina straight and strongly sclerotized, with well-developed
constrictor muscle.
Ref: Shimada et al., 2022
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Males:
- Monorchic; testis outstretched
- Seminal vesicle containing globular sperm.
- Spicules 1.4-1.8 cloacal body diam.(cbd) or long, paired,
slender and arcuate,
- Gubernaculum tubular, with a dorsocaudal apophysis which is longer
than the corpus of the gubernaculum and 0.5-0.7 cbd long.,
- Bursa absent.
- Plate-like precloacal ventromedian supplement present on elevation
of body cuticle,
- Postcloacal papillae absent.
- One pair of precloacal and six pairs of postcloacal body pores
present
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