Figure 1. Evolution of behavioral niche in the Mygalomorphae. The top panels show ancestral state reconstructions of retreat construction method (left) and retreat-entrance type (right) with the key to states below the reconstructions. Complete cladograms show reconstructions using Maximum Parsimony (MP) on our supertree, and partial phylograms and pie charts show relevant sections of the Maximum Likelihood (ML) reconstructions, conducted on the genus-level phylogeny. The bottom panel shows examples of different behavioral niches, with the genus, niche, and photographer as follows (clockwise from top left):Namirea (Euagridae), opportunist + web entrance, J. Wilson;Sphodros (Atypidae), burrower + purse-web entrance, R. Deans;Hadronyche (Atracidae), opportunist + web entrance, M. Rix;Euoplos (Idiopidae), burrower + trapdoor entrance, J. Wilson;Atypoides (Antrodiaetidae), burrower + turret entrance, C. Raspet; Linothele (Dipluridae), opportunist + web entrance, K. Venegas Valancia; Kwonkan (Anamidae), burrower + collar entrance, T. Barbin; Migas (Migidae), nest-builder + trapdoor entrance, G. Walter; Arbanitis (Idiopidae), burrower + open entrance, J. Wilson.