Genus Cacopaurus
Thorne, 1943

 Female: Body very small (0.2-0.3 mm), cylindroid-obese (a = 5-8). Cuticle thin, bearing minute tubercles. Lateral field with four lines, ornamented with rows of tubercles. Labial framework weakly developed. Stylet very long (92-102 um) in regard to body size. Vulva very posteriorly situated; postvulval part very short, conoid. Uterus thick walled. (Bionomics: Females sedentary on roots of woody plants.)

 Male: No stylet. Oesophagus degenerated. Caudal alae weakly developed, adanal.

 Juvenile: Stylet well developed.