Maximum-likelihood (ML) phylogeny inferred from Dataset 2, including the amino acid sequences of the 13 PCGs and the nucleotide sequences of the two rRNAs (4518 characters; 13 partitions). A ML tree; double slashes indicate shortened branches. B Enlargement of part of the tree showing the true branch lengths leading to the three tanaidomorphs, Arctotanais alascensis, Pseudotanais sp., and Sinelobus kisui. Numbers near nodes are ultrafast bootstrap values (UFBoot). UFBoot ≥ 95%, indicating strong branch support, are in bold font. The scale bars indicate branch length in substitutions per site.