Fig. 4
From: A new species of Xenoturbella from the western Pacific Ocean and the evolution of Xenoturbella
Internal phylogeny of Xenoturbella. a Unrooted maximum likelihood tree of Xenoturbella species based on mitochondrial 13 protein-coding genes. Bootstrap values are shown at the nodes. H: holotype, P: paratype. AM, DQ: sequences deposited as AM296016 and DQ832701, respectively. b Pairwise genetic distances within and between Xenoturbella species calculated from cox1 alignments. “‘shallow’ clade” and “‘deep’ clade” show inter-species differences between species belonging to each clade only. In “all species”, inter-species differences between all xenoturbellid species are shown. Each box represents the inner 50% quantile (median marked by the solid line). Whiskers extend to 1.5 times the interquartile range, with circles indicating outliers. Original data are available in Additional file 6: Table S1