Taxonomic evolution and consistency across the datasets.

The Sankey Diagram in the upper panel represents the evolution of the taxonomic units that have been either split or lumped with the taxonomic revision of the study. The size of the rectangles indicate the number of level-2 MOTUs identified in each morphological species, and the outline indicate in which dataset they have been identified (from either the reference sequences, environmental sequences or both). The lower panel indicate which portion of the diversity (Both for diversity–OTUs and volume—reads) could be attributed to morphological (barcoded) species of planktonic foraminifera.