The
anatomical cluster that is composed of the spurs that are
proximal to the distal
margin of the
tibia.
written by: Vilhelmsen, L. 2001. Phylogeny and classification of the extant basal lineages of the Hymenoptera. Zoological Journal of the Linnean Society [=Journal of the Linnean Society of London, Zoology] 131:303-442.