Fig. 3

Evolution of mitochondrial gene arrangement in Aculifera [(Solenogastres + Caudofoveata) + Polyplacophora] with hypothetical ancestral gene orders. (A) ML phylogeny of Aculifera based on 13 protein coding genes translated into amino acids. BS values of 99 or higher shown. Green boxes: hypothetical gene rearrangements (for number of all events see Supplementary Table 7). Blue and yellow box: hypothetical synapomorphic events regarding mitochondrial gene order. (B) Ancestral gene order of Polyplacophora (after [21]). (C) Ancestral gene order of Caudofoveata and (D) Solenogastres inferred through CREx analyses. (E) Hypothetical ancestral gene order of Mollusca (after [54]). Abbreviations: dupl, duplication, i, inversion, iT, transposition with inversion, t, transposition, tdrl, tandem duplication random loss. Preceding number indicates number of events