Xyalidae Chitwood, 1951

Leduc, Daniel, 2023, New nematode species and genera (Nematoda: Chromadorea) from cold seeps on Hikurangi Margin, New Zealand, European Journal of Taxonomy 856, pp. 1-45 : 22

Family Xyalidae Chitwood, 1951

Diagnosis (from Fonseca & Bezerra 2014)

Cuticle striated. Six outer labial setae and four cephalic setae in one circle, with cephalic setae shorter than or at most equal to outer labial setae. Often additional setae and occasionally eight groups of subcephalic setae present. Buccal cavity usually funnel-shaped, completely or only at the base surrounded by pharyngeal tissue. Ventral gland mostly absent. Females with one anterior ovary to the left of intestine. Males usually with two testes, the anterior one to the left of intestine, the posterior one to the right of intestine (or absent).

Remarks

A list of valid genera and species of the family Xyalidae was provided by Venekey et al. (2014). The Xyalidae is a large and diverse family of nematodes currently comprising 50 valid genera ( Venekey et al. 2014; Jiang & Huang 2015; Leduc 2015; Yu & Xu 2015; Gagarin 2020).