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Abstract
The complete mitochondrial genome of the Ephippus orbis has been sequenced. The mitochondrial genome is 16 670 bp in length, containing 13 protein-coding genes, 2 ribosomal RNA genes, 22 transfer RNA genes, and one control region. The gene order and the composition of E. orbis mitochondrial genome were similar to that of most other vertebrates. The overall nucleotides base composition of the heavy strand is A (27.17%), G (16.41%), C (31.46%), and T (24.96%). With the exception of the NADH dehydrogenase subunit 6 (ND6) and eight tRNA genes, all other mitochondrial genes are encoded on the heavy strand. Seen from the phylogenetic tree (), E. orbis, Platax teira, and Platax orbicularis from the same family (Ephippidae) clustered into one branch and were significantly divergent from the other families of closely related fish species.
Declaration of interest
The authors report no conflicts of interest. The authors alone are responsible for the content and writing of this article. This work was supported by the National 863 Program of China (Nos. 2012AA10A407 and 2012AA10A413), Research Funded Projects of Hainan University (kyqd1525), Natural Science Foundation of Hainan Province (20153168), Key Discipline Characteristic Cultivated Construction Projects of Hainan Province.