Figure F20. Photomicrographs of typical lower Miocene planktonic foraminiferal assemblage (upper panel; Sample 342-U1405A-17H-CC) including the morphologically distinctive dentoglobigerinids (lower panel; Sample 342-U1405A-14H-2, 100–102 cm), so named after the presence of their characteristic calcite “teeth” secreted over the apertural opening.
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