Fig. 2
From: What is Xenoturbella?
Phylogenetic position of Xenoturbella. a Squares indicate phylogenetic positions previously suggested for Xenoturbella, based mainly on morphology. b Two competing theories for the phylogenetic position of Xenoturbella based on recent phylogenomic analyses. Both hypotheses suggest a close relationship with the Acoelomorpha, forming the phylum Xenacoelomorpha