alternative definition added about 15 years ago by Istvan Miko
The single pair of functional spiracles on the metasoma, which are present
on the seventh metasomal or sixth gastral tergum (normally the second last tergum).
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.