Distribution and phylogenetic relationships of Tridimeris species. a Geographic distribution of the species belonging to the T. sect. Tridimeris (circles) and T. sect. Zoque (stars). b Maximum likelihood tree (RaxML) based on 290 Annonaceae wide exons. Blue circles indicate strongly supported clades (bootstrap values = 100); the bars indicate the position of the T. sect. Tridimeris (blue) and the T. sect. Zoque (reddish). On the right, photographs of the flowers of T. chiapensis (at the top) as a representative of the T. sect. Zoque and the flower of T. nebulosa (at the bottom) as a representative of the T. sect. Tridimeris