Genus Parasphaerolaimus Ditlevsen, 1918

Diagnosis (modified from Fonseca & Bezerra 2014). Sphaerolaimidae . Buccal cavity has six anterior and three posterior, circularly arranged elements. The anterior-most part of the inner pharyngeal wall transformed into six plates. Longitudinal ribs of the lip region in all juvenile stages correspond to a uniform pattern that differs from that of the adults. Eight groups of subcephalic setae present in all juvenile stages and adults.

Type species: Parasphaerolaimus paradoxus Ditlevsen, 1918

= Sphaerolaimus paradoxus (Ditlevsen, 1918) Filipjev, 1946