Periclistus
Periclistus is a genus of gall wasps in the tribe Diastrophini, formerly included in the tribe Synergini. There are at least 17 described species in Periclistus. Species from this genus are associated with host plants in the rose family, where in a phenomenon called agastoparasitism, they inquiline in the galls of at least four related species, Diastrophus, Diplolepis, Liebelia, and ''Xestophanes.''