Gnathobdellida

例句：

1. 1. The discovery of this species has led to a new understanding of the ecosystem.
   这一物种的发现有助于我们理解生态系统。
2. 2. The researchers found that Gnathobdellida was an important part of the food chain.
   研究人员发现，格纳托贝德利达是食物链中的重要一环。
3. 3. This new species is similar to Gnathobdellida but with different characteristics.
   这种新物种与格纳托贝德利达相似，但具有不同的特征。