epiphallus

noun3

1. •
   In some orthopterans, a plate adjacent to the genital complex.

   • Hadrotettix and Heliastus lack pale streaks but possess trilobed epiphalli, which led me to look for other characteristics shared with the Hippiscus group. — 1981
2. •
   In some dictyopterans, a pair of valves adjacent to the phallus.
3. •
   In some gastropods, an enlargement of the vas deferens that continues beyond the apex of the penis.

   • In mature Arion the atrium is divided into upper and lower atria, with the oviduct, spermatheca duct and epiphallus opening into the upper atrium. — 2012