1. Cyclostomates, also known as cyclostomes, are a group of jawless vertebrates.
圆口动物，也称为圆口动物类群，是一类无颌脊椎动物。
2. Lampreys and hagfish are examples of cyclostomates.
七鳃鳗和粘鳞七鳃鳗是圆口动物的例子。