Subfamily Siphonolaiminae Filipjev, 1918

Diagnosis (from Fonseca & Bezerra 2014)

Six + four cephalic setae situated at more or less same level. Outer labial setae always shorter than cephalic setae. Amphids circular. Buccal cavity may contain axial cuticularized spear-like structure (siphon). Pharynx narrow anteriorly and widening posteriorly. One anterior outstretched gonad.