Family Linhomoeidae Filipjev, 1922

Diagnosis (From Fonseca & Bezerra 2014)

Cuticle often striated, sometimes smooth. Inner labial sensillae papillose or not observable. Amphideal fovea usually circular, rarely unispiral. Inner side of labial region formed by an annular, soft-skinned pad that narrows the buccal opening. Cardia long and conspicuous. Usually two outstretched and opposed gonads, rarely single gonad present. Anterior gonad to the left or right of intestine, posterior gonad to the opposite side.