all pictures © robin williams
gall insect galleries
some causers and inquilines found in
oak & rose bedeguar galls
From the left: Rose bedeguar gall, Common spangle on oak, Cherry gall on oak
Terms used here:
A 'plant gall' is a specifically-shaped, consistant growth on a plant, produced by a gall-wasp, providing food and shelter for the insect-causer.
A 'causer' is the species of insect which causes that particular gall to form and grow into its unique shape and composition.
An 'inquiline' is an insect which lays its egg within the gall and whose larva feeds on its food store, but does nothing to promote the evolution of the gall.
A 'parasitoid' is a parasitic wasp (chalcid or ichneumon) which lays its eggs in or on the insects found inside the gall - whether causers, inquilines or other parasitoids.
'm' or 'f' refer to male or female (sexual) insects.
'ag' is an agamic female; one that reproduces asexually.
'lengths' in millimetres are for head & body only - excluding projecting ovipositor sheaths.