(Figure 1) Distribution of dinoflagellate cysts in the mid-Cretaceous of DSDP...
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Species abundance: D = dominant (>100 specimens), A = abundant (51-100), C = common (21-50), F = few (4-20), R = rare (1-3), - = absent.
物种丰度分级:D=优势种(标本量>100),A=丰盛种(51~100份标本),C=常见种(21~50份标本),F=少量种(4~20份标本),R=稀有种(1~3份标本),-=无标本。



