XYALIDAE Chitwood, 1951

Sun, Yan & Huang, Yong, 2017, One new species and one new combination of the family Xyalidae (Nematoda: Monhysterida) from the East China Sea, Zootaxa 4306 (3), pp. 401-410 : 402

Family XYALIDAE Chitwood, 1951

Diagnosis. Cuticle striated; six outer labial sensilla and four setiform cephalic sensilla located in one circle, with cephalic sensilla shorter than or at most equal to labial ones; buccal cavity usually funnel-shaped; amphidial fovea usually circular; ventral gland mostly absent; males usually with two testes, the anterior one to the left side of intestine, the posterior one (may be absent) to the right side; females with one anterior ovary to the left side of intestine ( Fonseca and BeZerra, 2014).