Sequence differences among and within species clades of <i>Polymixia</i>.

The sequence difference between each pair of species is the total number of sites with different nucleotides based on our alignment of 4983 sites (S1 File); comparisons are given as observed range with mean in parentheses. Colors indicate mean number of differences out of 4983 as follows: 0–10, purple; 11–20, blue; 21–30, green; 41–50, yellow; 51–80, orange; 81–100, red.