Female:
- Body translucent white, pear-shaped with short neck, posteriorly
rounded, without tail protuberance.
- Labial disc fused with medial lips; dumbbell-shaped in face
view. Medial lips crescent-shaped. Lateral lips large, triangular,
separated from medial lips and head region.
- Head region not set off from regular body annules.
- Distance of excretory pore to head end variable in distance
(30.9–118.2 um); located in most specimens midway between anterior
end and metacorpus.
- Stylet long and robust; cone of same size as shaft, tip
straight or slightly curved dorsally, widening gradually
posteriorly; junction of cone and shaft uneven. Shaft cylindrical
and same width throughout, or widening slightly near junction with
knobs; knobs broad laterally,
- Distance between stylet base and dorsal esophageal gland orifice
(DGO) moderately long (4.7–6.3 um).
- Esophageal glands large, trilobed; dorsal lobe largest,
unicleate; two subventral nucleated lobes variable in size, shape,
and position; located posterior to dorsal gland lobe.
- Two ovaries and six rectal glands as characteristic of genus.
- Perineal patterns extremely rounded to oval-shaped. Dorsal arch
high and rounded except for striae near vulva, which are low with
rounded shoulders. Lateral field with distinctly forked striae.
Ventral striae vary from wavy to coarse.
- Tail tip area well defined, free of striae; often with a few to
several subcuticular punctations.
- Vulva located in depression, surrounded by wide cuticular ridge.
- Anus distinct, surrounded by a thick cuticular layer.
Male
- Body translucent white, vermiform; body tapering anteriorly,
bluntly rounded posteriorly; tail twisting through 90° in
heat-killed specimens.
- Head cap high in lateral view, extending posteriorly onto
distinctly set-off head region. Head region high in lateral view,
tapering posteriorly, distinctly set off from body.
- Hexaradiate cephalic framework well sclerotized; vestibule
and extension distinct.
- Stoma slitlike, located in large, hexagonal prestomatal cavity,
surrounded by pore-like openings of six inner labial sensilla.
Medial lips very wide, outer margins crescent-shaped, sloping
posteriorly.
- Amphidial apertures large, elongated, slit-like between
labial disc and lateral sectors of head region.
- Body annules large, distinct. Lateral field with four incisures,
two beginning near level of stylet knobs and two near level of
metacorpus; lateral field areolated, encircling tail.
- Stylet robust, large; cone straight, pointed, gradually
increasing in diameter posteriorly; opening located several
micrometers from stylet tip; cone of same size as shaft. Shaft
cylindrical, posterior end wider than anterior end. Knobs large,
wide, rounded, set off from shaft.
- DEGO to stylet base variable in distance (3.7–6.4 um),
- Procorpus indistinctly outlined, metacorpus elongate,
oval-shaped with valve enlarged, triradiate cuticular lumen lining;
subventral esophageal gland orifices branched, located posteriorly
to metacorpus.
- Excretory pore distinct, variable in position (150.0–180.9
um), terminal duct long. Hemizonid located anterior to excretory
pore.
- Usually one testis, rarely two testes, outstretched, or reflexed
anteriorly.
- Spicules long, slender, slightly arcuate with single tip, short
head, wide vellum, and indistinct shaft. Gubernaculum distinct,
crescent shaped.
- Tail short and rounded. Phasmids slit-like opening near level of
cloaca
Ref: Eisenback et al (2003)
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