Figure 2

Distributions of the relative position of lateral veins (r). The values for r ≤ 1.5 are shown. The codes of species names are shown in Table 1. For each species, each value of r for a lateral vein is shown as a filled circle, which is arranged so as not to overlap others (i.e., a bee swarm plot), and the violin-shaped pair of red curves shows the estimated probability density distribution (i.e., violin plot); the wider the violin at a particular height, the more common the r values are around that value. The p-values for the Hartigan’s dip test of unimodality are shown under the code of each species; lower p-values indicate higher departure from unimodality. Species are arranged in alphabetical order, and data for the first fifteen species (Ame–Hyp) are shown (see Fig. 3 for Jms–Udj).