DescriptionOrussus abietinus (Hymenoptera- Orussidae) - a parasitic wood wasp ! (10136426163).jpg
The Orussoidea, parasitic wood wasps, have retained a relatively ancestral form of ectoparasitism of
buprestid beetles and siricid woodwasps... Little is known of the mode of action of the venom, if any, but late-instar larvae appear to feed on or in the host after it is dead.
The phylogenetic relation of Orussidae within the order of hymenoptera seems to be: [Siricoidea + (Orussoidea + Apocrita)].
source: J. B. Whitfield (1998) "PHYLOGENY AND EVOLUTION OF HOST-PARASITOID INTERACTIONS IN HYMENOPTERA", Annual Review of Entomology Vol. 43: 129-151
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