No creditable macrofossil record of the Fagaceae exists in the Cretaceous deposits and all the Cretaceous microfossil reports remain equivocal and require further study.

白垩纪尚无壳斗科可化石记录，微化石需要进步研究才能确定亲缘关古新世壳斗科已经分化出两个类群。