Complete mitochondrial genome sequence of a brackish water clam Corbicula japonica (Cyrenidae: Bivalvia) collected from an estuary of Gwangyang Bay in Korea.

The complete mitochondrial genome of the clam Corbicula japonica is 17,432 bp in length. The sequence consists of 13 protein-coding, 2 ribosomal RNAs, and 22 transfer RNA genes (GenBank accession no. MZ895053). The proportion of base-pairs in C. japonica are A + T (70.5%) and G + C (29.5%). Phylogenetic analysis reveal C. japonica to be sister species to C. fluminea within the monophyletic genus Corbicula , with high support. This study is helpful to the classification of the brackish water clam C. japonica , which is difficult to identify during early development owing to variation of shell morphology.