genital opening
From ZooTerms (Dictionary of Invertebrate Zoology)
genital opening: 1. (Arthropoda: Chelicerata) a. In Acari, originally a transverse slit or trifid orifice associated with segment eight. b. In many actinotrochid Acari, it is found in the progenital chamber where it is named the eugenital opening.
2. (Mollusca: Bivalvia) Opening for gonadal products leading into the cloacal passage.
