part of develops into larval abdominal segment 10 genital disc analia primordium anal primordium 2022-01-17T13:04:49Z fly_anatomy.ontology FBbt:00052054 Posterior dorsal region of the genital disc that derives from abdominal segment 10 (Keisman et al., 2001). It gives rise to the adult analia (Casares et al., 1997; Keisman et al., 2001) and hindgut (Chen and Baker, 1997).