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)