(Figure 8b) Distribution of Cretaceous planktonic foraminifers, calpellionids...
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Species abundance: A = abundant, AF = frequent, C = common, F = few, R = rare, small case letters = reworked, cf. = confirm, ? = presence is questionable, - = absent.
物种丰度(Species abundance)分级标注规范如下:A代表极丰富(abundant),AF代表常见(frequent),C代表普通(common),F代表稀少(few),R代表罕见(rare);小写字母表示经再处理(reworked),cf.(confirm)表示确认,?表示存在存疑,-表示缺失(不存在)。



