alternative definition added about 14 years ago by Istvan Miko
Typically a partly transverse groove or line on the mesepimeron that differentiates an upper mesepimeron and lower mesepimeron; when present it is often arched posterodorsally from near the mesocoxa, in which case it can also delimit a trochantinal lobe anterior to the mesocoxa, or it extends diagonally or transversely from the mesopleural suture, but it is quite varied and sometimes is reduced to a single pit.
Reference: Gibson , G. A. P., J. D. Read , and R. Fairchild. 1998. Chalcid wasps (Chalcidoidea): illustrated glossary of positional and morphological terms ..
Cross reference:
None provided.