(Figure 3) Distribution of planktonic foraminifers in the Upper Cretaceous of...
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Species abundance: C = common, F = few, R = rare,VR = very rare, - = not observed.
物种丰度(Species abundance):C = 常见(common),F = 少见(few),R = 稀有(rare),VR = 极稀有(very rare),- = 未观测到(not observed)。



