Fig. 5
PGLS analysis of four sexual traits against gonadal sex allocation. Each panel (A–D) includes the fit and corresponding statistics for analysis with all species (solid line, top), only species assigned to the hypodermic mating syndrome (dotted line, middle) or only species assigned to the reciprocal mating syndrome (dashed line, bottom). Color shows the inferred mating syndrome: hypodermic (yellow), intermediate (light green), reciprocal (green), and unclear (gray). Values are plotted on a logarithmic scale in panels B–D but the axis is labelled with back transformed values. R2 values represent R2pred of the full PGLS including the phylogeny. Detailed results are in Additional file 1: Table S6