petromyzoniformes的翻译，读音

七鳃鳗目

This is the direct translation of "petromyzoniformes" as a taxonomic order in biology.

It's important to note that the word "七鳃鳗" (Qī Sāi Mán) itself is the Chinese name for the creatures in this order. So, it's very much like saying "the order of lampreys" in English.