Triangular space between clitoris and hymen -
Ref: synopsis of Forensic Medicine & Toxicology (K.S.Narayan Reddy)28th edition ,page 203 In a virgin female, the labia minora are two thin folds of skin just within the labia majora. The lower poions of labia mainora fuse in midline and form a fold fourchette. The depression between fourchette and vaginal orifice is called fosa navicularis. The clitoris is small and the triangular narrow space clitoris and hymen is called vestibule.
Fourchette
Fossa navicularis
Vestibule
Labia minora
Sexual offences and infanticide