The complete mitochondrial genome and phylogenetic analysis of hydrozoan jellyfish Eirene ceylonensis (Cnidaria, Hydrozoa, Eirenidae) in the coastal sea of Qinhuangdao, China

Abstract

Eirene ceylonensis, a hydrozoan jellyfish species with a complex polymorphic life cycle, is widely distributed in the Chinese coastal sea. In this study, we conducted sequencing and analysis of the first complete mitochondrial genome of E. ceylonensis, obtained from the coastal sea of Qinhuangdao, China. The linear mitochondrial genome is 14,997 bp in length with the overall AT content being 72.8%, encoding 13 protein-coding genes (PCGs), two transfer RNA (tRNA) genes (tRNA-Met and tRNA-Trp) and two ribosomal RNA (rRNA) genes (rrnS and rrnL). Phylogenetic analysis of 13 PCGs suggests that the E. ceylonensis is closely related to Laomedea flexuosa. The availability of the complete mitochondrial genome of E. ceylonensis will be useful for studying the evolutionary relationships of hydrozoan jellyfish species.

Keywords:

• Eirene ceylonensis
• hydrozoa
• mitogenome
• phylogenetic analysis

Acknowledgement

We would like to thank Dr Xiaobo Yuan for his help in fieldwork and sampling.

Ethical approval

The jellyfish species is not included in the 'List of Protected Animals in China’, and the study did not involve endangered or protected species. The approval of sample collection is not required according to the Animal Ethical and Welfare Committee of Hebei Normal University of science and Technology.

Author contribution

YC, conceived and designed the experiments, analyzed the data, prepared figures, and approved the final draft. SD, analyzed the data, prepared figures, and approved the final draft. DS, analyzed the data, prepared figures, and approved the final draft. YW, analyzed the data, prepared figures, reviewed drafts of the paper. JN, analyzed the data, prepared figures, reviewed drafts of the paper. ZL, conceived and designed the experiments, reviewed drafts of the paper.

Disclosure statement

No potential conflict of interest was reported by the authors.

Data availability statement

The genome sequence data supporting this study’s findings are openly available in GenBank of NCBI at https://www.ncbi.nlm.nih.gov/under the accession number OR149020. The associated BioProject, Bio-Sample and SRA numbers are PRJNA985931, SAMN35816308, and SRR24984782, respectively.

Additional information

Funding

This work was supported by Hebei Natural Science Foundation, grant number D2022407010; Science and Technology Project of Hebei Education Department, grant number QN2023194; Doctor Foundation of Hebei Normal University of Science and Technology, grant number 2022YB016; Open Fund Project of Hebei Key Laboratory of Ocean Dynamics, Resources and Environments, grant number HBHY01.