alternative definition added over 11 years ago by Istvan Miko
A sclerotized area at the anterior fore wing margin, basal to the pterostigma, often consisting simply of an extension of the first abscissa of the radial sector of the fore wing (1RS).
Reference: Karlsson, D., and F. Ronquist. 2012. Skeletal Morphology of Opius dissitus and Biosteres carbonarius, with a Discussion of Terminology and Morphological Variation in Opiinae (Hymenoptera: Braconidae). PLoS ONE 7:1-38.
Cross reference:
None provided.