现代的珍珠鹦鹉螺与古鹦鹉螺的关系备受争议，但它也有类似的结构安排。

Modern pearly nautiluses, whose relationship to ammonites is much debated, have a similar arrangement.

youdao

现代的珍珠鹦鹉螺与古鹦鹉螺的关系备受争议，但它也有类似的结构安排。

Modern pearly nautiluses, whose relationship to ammonites is much debated, have a similar arrangement.

youdao