The superfamily
Chrysidoidea is a very large cosmopolitan group (some 6,000 described species, and many more undescribed) , including many
parasitoid or
cleptoparasitic wasps. There are three large, common families (
Bethylidae,
Chrysididae, and
Dryinidae) and four small, rare families (Embolemidae, Plumariidae,
Sclerogibbidae, and
Scolebythidae). Most species are small (7 mm or less), almost never exceeding 15 mm. This superfamily is traditionally considered to be the basal taxon within the
Aculeata, and, as such, some species can sting, though the
venom is harmless to humans.