Chitinozoa

例句：

1. 1.The chitinous exoskeleton of the snail provides protection against predators.
   蜗牛的壳状外骨骼为它提供了对捕食者的防护。
2. 2.The discovery of new species in this region has led to a better understanding of the biodiversity within the chitinous ecosystem.
   该地区新物种的发现有助于更好地理解壳状生态系统内的生物多样性。
3. 3. The researchers focused on studying the behavior and life cycle of the chitinous creatures foundin the deep sea.
   研究人员专注于研究在深海中发现的壳状生物的行为和生命周期。