Maximum-likelihood (ML) phylogeny inferred from Dataset 3, including nucleotide sequences of the 13 PCGs (first and second codon positions only) and of the two rRNAs (8182 characters; 17 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.