In ventral view, gubernaculum tapering anteriorly to form a neck then enlarging slightly to a ventrally curved end. In lateral view, bow-shaped, constricted at posterior part to round proximal portion. Tail conical, tapering to rounded body terminus. Body slender, gradually tapering posteriorly, generally ensheathed in cuticle of second stage juveniles. Lip region not set off.
Lateral fields distinct.
Mouth opening closed. Esophagus long and narrow, terminating in basal bulb, weak and less prominent than in adults. Excretory pore at level of mid esophagus. Excretory glands displacing basal bulb and anterior end of intestine. Nerve ring distinct, anterior to basal bulb.