Related to the pearly nautilus, these spiral-shelled Marine creatures went extinct along with the dinosaurs around 65 million years ago.
菊石是鹦鹉螺的近亲，这种外壳呈螺旋状的海生生物在6500万年前与恐龙一起灭绝了。
Related to the pearly nautilus, these spiral-shelled Marine creatures went extinct along with the dinosaurs around 65 million years ago.
菊石是鹦鹉螺的近亲，这种外壳呈螺旋状的海生生物在6500万年前与恐龙一起灭绝了。
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