alternative definition added over 13 years ago by Istvan Miko
Inverted V- or Y-shaped grooves on the upper face of many eulophids in the
same position as the scrobes, which unite dorsally and, if inverted Y-shaped, continue
dorsally as a median sulcus toward the anterior ocellus (see also frontofacial sulcus).
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.