Maximum likelihood (ML) tree inferred from the mtMutS sequences of Chrysogorgia, Metallogorgia, Pseudochrysogorgia and related species. Numbers at the nodes represent the ML bootstrap values and the posterior probability values of Bayesian analysis (BI). Newly sequenced species are in bold. Support ≤ 50%/0.50 is shown as ‘--’. Alignment flatfile showed the mtMutS deletion for Chrysogorgia carolinensis sp. nov. with “–”, using C. averata KC788265 as a reference.