FIGURE 6.22 Distributions of body outline length of samples of four coexisting species of strophomenide brachiopods collected from a late Ordovician marine sediment in Indiana. The species shown, from left to right, with their mean lengths in cm, are Eochonetes clarksvillensis (2.2 cm), Leptaena richmondensis (3.3 cm), Strophomena planumbona (4.9 cm), and Rafinesquina alternata (7.7 cm). (After Hermoyian et al., 2002.)