FIG. 8 in The molluscs of the "Falunière" of Grignon (Middle Lutetian, Yvelines, France): quantification of lithification bias and its impact on the biodiversity assessment of the Middle Eocene of Western Europe

FIG. 8. — Sample-based rarefaction curves, plotted for gastropods (A, D, G), bivalves (B, E, H) and their sum (C, F, I), considering three cumulated size classes (> 5 mm: A-C;> 2 mm: D-F;>1 mm: G-I). Dotted lines represent the sampling/diagenesis bias threshold (SDT) for each analysis. A graphic representation of the variables used in the definition of the extrapolated Diagenesis Gap (eDG) is given on the diagram E.