An element of the agromyzid male terminalia, further explained in the section on male terminalia.
The diversity of gonite shapes within Agromyzidae might be demonstrated by this Illustrations: Ag nigrella genitalia.pct, Pseu europaea epandrium.pct, Oph pinguis hypandrium.pct.

Alternative forms for gonite : gonites, parameres, postgonite, postgonites.