(Table 7) Occurrence of selected diatom species in ODP Hole 119-744A
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Species abundance: A = abundant (>2 specimens in one field of view (X1800)), C = common (1 specimen in 2 fields), F = few (1 specimen in each horizontal transect), R = rare...
物种丰度（Species abundance）分级规则如下：A为丰富（abundant）：单个1800倍放大视野内标本量超过2件；C为常见（common）：每2个视野内可见1件标本；F为稀少（few）：每条水平样带内可见1件标本；R为罕见（rare）……
