(Table 1) Distribution of middle Eocene-Pleistocene calcareous nannofossils i...

Species abundance: V = very abundant, A = abundant, C = common, F = few, R = rare, - = absent.物种多度（Species abundance）分级：V=极丰富，A=丰富，C=常见，F=少见，R=稀有，"-"代表缺失。