The story
From ecto- + spermalege.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: Part of the spermalege, derived from the ectoderm and consisting of a groove in the right-handed posterior margin of the fifth sclerite, overlying a pleural membrane. In order to access the female's haemocoel during traumatic insemination, male bedbugs insert their needle-like penis into the groove and pierce the pleural membrane. Full definition →
From ecto- + spermalege.
Etymology from Wiktionary, CC BY-SA 4.0.