Superfamily Campydoroidea Thorne, 1935

Diagnosis (modified from Smol et al. 2014)

Cuticle finely striated. Lip region truncated or set off. Inner labial sensilla papilliform, outer labial sensilla and cephalic sensilla usually papilliform, sometimes setiform. Amphid with slit-like or transversely oval aperture and stirrup-shaped fovea. Stoma tubular or conoid, with one to three teeth. Pharynx cylindrical anteriorly, with distinct basal bulb; valves absent. Secretory-excretory pore present or absent. Female reproductive system didelphic, amphidelphic or monodelphic prodelphic. Ovary branches reflexed antidromously or outstretched. Males monorchic, testis outstretched, spicules paired and symmetrical. Caudal glands and spinneret present or absent.

Included families

Family Campydoridae Thorne, 1935 .

Family Rhabdolaimidae Chitwood, 1951 .