The seabird Ichthyornis, dated to between 100 million and 70 million years ago had 20 pointed teeth in each jaw as well as a beak-like jaw tip.

距今 1 亿到 7000 万年前的海鸟鱼鸟在每个下巴上都有 20 颗尖牙，下巴尖呈喙状。