triphyodont

例句：

1. 1. The fossils found in the cave are a testament to the ancient life of triphyodonts.
   洞穴中发现的化石证明了三叶虫古生物的生活。
2. 2. Triphyodonts were once abundant in the ocean, but their numbers have dwindled significantly overtime.
   三叶虫在海洋中曾经非常繁盛，但随着时间的推移，它们的数量显著减少。
3. 3. Fossils of triphyodonts have been discovered in various parts of the world, providingvaluable insights into their evolutionary history.
   世界各地的不同地区发现了三叶虫化石，为了解它们进化的历史提供了宝贵的信息。