Figure 6 in Tracking parallel adaptation of shell morphology through geological times in the land snail genus Pupilla (Gastropoda: Stylommatophora: Pupillidae)

Figure 6. Thin-plate splines illustrating (theoretical) transitions in shape, side view, exaggeration 5 times. A, fossil P. loessica → extant P. loessica. B, fossil P. pratensis (including P. m. densegyrata) → extant P. pratensis. C, fossil P. pratensis (including P. m. densegyrata) → extant P. alpicola. D, extant P. pratensis → P. alpicola. E, extant P. loessica→ P. alpicola. F, fossil P. muscorum → extant P. muscorum.