In other words, metamorphosis in mole salamanders is an atavism.

换句话说，鼹鼠蝾螈的变形就是返祖。

As a possible example, the team pointed to the mole salamanders of Mexico and California.

这个团队提出了拿墨西哥和加利福尼亚的鼹鼠蝾螈作为一个可能的例子。