Gene organization of two mitochondrial genomes of the rotifers B. plicatilis and B. koreanus sp. nov. (A) Two circular mitochondrial genomes from B. koreanus sp. nov. One-letter abbreviations of amino acids are used to label the corresponding tRNA genes. (B) The thick line between pairs of mitogenomes between B. plicatilis and B. koreanus sp. nov. represents translocation. Modified from Hwang et al. (2013).