Table T5. Stratigraphic occurrence of the Pliocene key species belonging to the genus Thalassiosira, Hole 1150B.
Core, section
Depth (mbsf)
Thalassiosira cf. baldaufii
Thalassiosira baldaufii
T. frenguelliopsis subgroup
T. bipora subgroup
T. oestrupii subgroup
Thalassiosira sp.
In the T. trifulta group
Thalassiosira trifulta group
Others
T. cf. frenguelliopsis
Thalassiosira frenguelliopsis
Thalassiosira tetraoestrupii
Thalassiosira bipora f. prima
Thalassiosira bipora
Thalassiosira centra
Thalassiosira depressa
Thalassiosira praeoestrupii
Thalassiosira cf. praeoestrupii
186-1150B-                                
5R-CC 740.07 1         (S1) 17 (S1)     17(L2, S3)       34 465.5
6R-CC 756.54 2(L1) 9   6 3 (S1) 11     13(L2, S3) (S1) (S1)   33 456.5
7R-1 767.60   4   1 4   10   3(L1) 4       22 474.5
8R-CC 770.05   2   1(L1)     9(L1) 1 1 6(L2)       18 480
9R-CC 781.47   7   7   (S3) 9(L1, S1)     10(L1, S3)       26 463
10R-CC 791.04   2   (S1)   2(L1, S3) 6     9(L4, S2)       17 481.5
11R-CC 802.82   9   6(L2, S1)                   6 485.5
12R-CC 811.91   20(L1)   2(L2)                   2 498
13R-CC 819.78   12   4(L3)                   4 496
14R-CC 830.48   16   9(L1, S5)                   9 491
15R-CC 837.15   58 1(L1) (S2)                   1 499.5

Note: The number of photographed specimens used for the observation of features are shown in parentheses (L = light microscope, S = scanning electron microscope).