Oxychilus draparnaudi (CNMO 8470 Cadereyta, Querétaro). A–C shell in apical, ventral, and apertural view D, G genitalia of O. draparnaudi F, I internal ornamentation of the proximal penis E, H internal ornamentation of distal penis J, K live specimens. Abbreviations: BS bottleneck region, BC bursa copulatrix, DBC bursa duct, E epiphalus, F flagellum, P penis, POS prostatic portion of ovospermiduct, PR penial retractor, PS penial sheath, UOS uterine portion of ovospermiduct, V vagina, VD vas deferens, VG vaginal gland.