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Thalassiosira pseudonana Thalassiosira oceanica Conticribra weissflogii Conticribra guillardii Thalassiosira punctigera Thalassiosira aestivalis Thalassiosira anguste-lineata Thalassiosira rotula Thalassiosira gravida
0 7 15 22 30 Time (MYA)
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