Genus Leptoplana Ehrenberg, 1831

Diagnosis (after Faubel 1983, emended): Leptoplanidae without tentacles with a genital pit between male and female gonopore. Male copulatory apparatus with seminal vesicle and penis developed as eversible unarmed cirrus. Prostatic vesicle with ventral diverticulum at its proximal end. Female apparatus usually with rudimentary Lang’s vesicle.