Fig. 9 in The middle to late Eocene evolution of nummulitid foraminifer Heterostegina in the Western Tethys

Fig. 9. Distribution of the Eocene heterosteginid populations (mean values at the 95.44% confidence level) on the S–X (density of chamberlets in chamber 14 versus number of undivided post−embryonic chambers) bivariate plot (both scales are logarithmic).