Diagnosis: Pleurotylenchinae. Body small to moderately large
(0.4-1 mm), slender, straight to arcuate upon relaxation. Cuticle
distinctly annulated, without longitudinal ridges other than those in the
lateral fields; lateral fields with six rarely four incisures at
midbody, reducing in number to four in postvulval region. Deirids
just behind level of excretory pore. Prophasmids dorso-sublateral,
in females a little anterior to vulval level. Cephalic region small,
low, rounded, offset, rarely continuous, with indistinct annules;
framework with light to moderate sclerotization; labial disc indistinct,
round; amphidial apertures pore-like, labial. Stylet relatively small
(14-22 um) but about as long as percorpus; knobs distinct. Orifice
of dorsal oesophageal glands 2-3 um behind stylet base. Median oesophageal
bulb with refractive thickenings, not offset from precorpus. Isthmus
very long and slender. Basal bulb pyriform, base (mainly dorsal gland)
may extend over intestine. Vulva transverse, depressed, at 52-70%
of body length, usually shifted slightly from mid-ventral line, with lateral
membranes. Postvulval uterine sac prominent. Spermatheca round
to oval. Ovary outstretched, with single row of oocytes. Tails
elongate-filiform, 85-235 um long. Male with distinct, adanal bursa
often with asymmetrical flaps, a fixed rod-like gubernaculum, cephalated,
pointed 15-20 um long spicules, and slightly raised cloacal lips.