Fig. 3

a Selective pressure analysis in protein-coding genes present in the mitochondrial genome of Benedenia humboldti n. sp. KA, KS and KA/KS values were calculated using the γ-MYN model. b Selective pressure analysis in the cox1 gene of Benedenia humboldti n. sp. KA, KS and KA/KS values were calculated using the γ-MYN model and adopting a sliding window of length = 57 and step length = 12. See “Methods” and “Results and discussion” for further details