At the 25th anniversary of the British Plant Gall Society three colleagues who have been working for more than 20 years with cynipid gall systems provide a broad view of what has happened in the field and what questions might be most interesting for the near future to tackle. They fall broadly in five areas: How do they induce galls? How did galling evolve? Why do galls come in such amazing shapes and sizes? And how can we tell the inhabitants apart
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