In the summer of 2003 we began to zero in on one microfossil type whose complex morphological characteristics particularly intrigued us.

2003年夏天，我们开始瞄准一种微化石类型，其复杂形态引起我们兴趣。

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

白纪尚无壳斗科可化石记录，微化石需要进一步研究才能确定亲缘关系以及古新世壳斗科已经分化出两个类群。