Leptosomatidae Filipjev, 1916

Leduc, Daniel, 2013, Deontostoma tridentum n. sp. (Nematoda, Leptosomatidae) from the continental slope of New Zealand, Zootaxa 3722 (4), pp. 483-492 : 484

Family Leptosomatidae Filipjev, 1916

Diagnosis (from Smol & Coomans (2006)). Large nematodes (2–50 mm). Two circles of anterior sensillae: six inner labial sensilla mostly papilliform, six outer labial and four cephalice setae, often short. Amphids pocketshaped. Large number of metanemes with caudal filaments. Many species with ocelli. Buccal cavity usually narrow, sometimes with tooth-like thickenings. Pharynx inserts onto the body cuticle in the region of the buccal cavity, the cephalic capsule is variable in form. Three pharyngeal glands open in the buccal cavity. Pharynx always smooth in outline. Secretory-excretory system, if present, restricted to the pharyngeal region. Female reproductive system didelphic-amphidelphic with antidromously reflexed ovaries. Males with two opposed testes. Subventral or ventral pre-cloacal papillae (never tubules) often present. Caudal glands mostly present, extending into the precaudal region.