Females in this genus are very small. The female reproductive system has only one genital tract. Their uteri are parallel and oriented to their posterior. They bear a single egg at a time, and eggs are ovalish. Their vagina points anteriorly and is in the posterior third of their body (excluding the tail). Males have a caudal extremity which suddenly narrows half-way making its end thread-like. Their genital cone is well developed.
