alternative definition added about 15 years ago by Andy Deans
A spine-like, multicellular extension of the cuticle connected to an appendage by a socket; usually found on the tibiae.
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.