Fig. 1
From: The evolution of genital complexity and mating rates in sexually size dimorphic spiders
Summarized trait optimization in nephilid spiders. Ancestral states are reconstructed using parsimony optimization on a Bayesian phylogeny. Terminal names and branch length information are omitted for clarity; instead, typical male palpal anatomies are shown, and simple scores for male genital damage and female mating rates are given. Male and female genital complexity show positive phylogenetic correlation (PIC, P < 0.0001)