Feron
Guides
Feron crystallinum
Crystalline Gall Wasp
Feron crystallinum is a cynipid gall wasp that induces distinct galls on oak species in California. The species exhibits complex alternation of generations, producing different gall morphologies and wasp forms across seasonal cycles. The parthenogenic generation forms large, pink, hairy galls on leaf undersides, while the bisexual generation produces smaller, less hairy galls. Formerly classified as Andricus crystallinus, this species has been reclassified to the genus Feron based on phylogenetic relationships.