Revision of the genus Parasphaerolaimus (Nematoda: Sphaerolaimidae) with description of new species Author Zograf, Julia K. Author Pavlyuk, Olga N. Author Trebukhova, Yulia A. Author Tu, Nguyen Dinh text Zootaxa 2017 4232 1 journal volume 36546 10.11646/zootaxa.4232.1.4 62e8d61a-897f-4e24-b824-8fb6d9a1cd6d 1175-5326 292863 C622342F-6DB3-4DD0-84FB-F8DA4D403309 Genus Parasphaerolaimus Ditlevsen, 1919 Diagnosis (emended from Lorenzen 1978 ; Fonseca & Bezerra 2014 ): Sphaerolaimidae . Wall of buccal cavity consists of six anterior and three posterior, circularly arranged elements. Anterior-most part of inner pharyngeal wall transformed into six plates. Longitudinal ribs of lip region of all juvenile stages correspond to a uniform pattern that differs sharply from that of adults. Eight groups of subcephalic setae, corresponding to those of Sphaerolaiminae , occur in all four juvenile stages and in adults. Sexual dimorphism in size of amphids.