Figure 7 in Ontogeny and evolutionary significance of a new acrotretide brachiopod genus from Cambrian Series 2 of South China

Figure 7. Bivariate plots of ventral valves of Palaeotreta shannanensis gen. et sp. nov. from the Shuijingtuo Formation showing ontogenetic stage T1 (red) and stage T2 (blue). A, plots of valve width – length ratio (W/L), length at maximum width – valve length ratio (Lm/L), and valve height – length ratio (H/L). B, plots of apical process length – valve length ratio (La/L), pedicle foramen length – valve length ratio (Lf/L).