Slit-like amphids well down on lips. spear with small to large basal
knobs, its muscles attached to a cuticular band and cephalic arches.
Median bulb well anterior to middle of esophagus. Cardia extending
into esophagus base. Anterior ovary outstretched. Posterior
uterine branch shorter than body diameter. Phasmids easily seen.
Tail uniformly slender conoid to subacute terminus.
Type species: Basiroides obliquus