Bellabrunetia catherinae gen. et sp. nov., the first Chinese Mesozoic isophlebioid dragonfly, is described. This fossil is the first known Isophlebioptera with well–preserved body structures, demonstrating that the fore– and hindwings are of very different size and shape in Campterophlebiidae, and that the female Campterophlebiidae had an endophytic way of oviposition, unlike the Isophlebiidae.