alternative definition added over 10 years ago by Andy Deans
a hole in a sclerite allowing for the passage of internal organs into an adjacent body region
Reference: Ronquist, F., and G. Nordlander. 1989. Skeletal morphology of an archaic cynipoid, Ibalia rufipes (Hymenoptera: Ibaliidae). Entomologica Scandinavica, Supplement 33:1-60.
Cross reference: None provided.