The flattened conjunctival invagination at the posterior
margin of the
Waterston's evaporatorium that folds over the posterior
region of the
evaporatorium.
written by: Ulmer, J. 2021. The Waterston’s evaporatorium of Ceraphronidae (Ceraphronoidea, Hymenoptera) – A morphological barcode for a cryptic taxon . Journal of Hymenoptera Research.