(Table 2) Stratigraphic occurrences of radiolarian species in early to middle...
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Species abundance: A = abundant (>50% of total assemblage), C = common (15-50%), F = few (3-15%), R = rare (1-3%), T = trace (<1%), - = absent
物种多度(Species abundance)分级标准如下:A=优势种(abundant),占总群落组合(assemblage)的50%以上;C=常见种(common),占15%~50%;F=少量种(few),占3%~15%;R=稀有种(rare),占1%~3%;T=微量种(trace),占比<1%;-=缺失(absent)。



