Fig. 2 in Gradual evolution of the Early Cretaceous marine gastropod Rissoina lineage in central Poland

Fig. 2. Temporal changes of Rissoina (Buvignieria) sp. in the Wąwał section. The mean value, standard deviation, p of Kolmogorov−Smirnov D statistic, and observed range for diameter at the first whorl of the teleoconch (D), whorl height between abapical and adapical suture at the end of the first whorl of teleoconch (SH), shoulder angle (SA), and apical angle (A). Note that in the lower part of the section where the environment is unstable only the ecophenotypic parameters (D and SH) change whereas the parameters SA and A, both signals of morphological changes start to evolve after the environment stabilizes. The Kolmogorov−Smirnov D statistic counted with PAST software (Hammer et al. 2001) gives roughly the same results.