alternative definition added over 14 years ago by Andy Deans
A ridge bordering the gena ventrally; it extends from the hypostomal carina to the anterior or facial articulation of the mandible
Reference: Goulet, H., and J. T. Huber. 1993. Hymenoptera of the World: An Identification Guide to Families. Research Branch, Agriculture Canada Publication 1894/E., Ottawa, ON 668 pp.
Cross reference:
None provided.