Complete mitochondrial genome of the acorn barnacle Striatobalanus amaryllis (Crustacea: Maxillopoda): the first representative from Archaeobalanidae.

The mitochondrial genome of the barnacle Striatobalanus amaryllis (Sessilia: family Archaeobalanidae) is 15,063 bp in length. All the 13 protein-coding genes (PCGs) initiate with ATD codon (ATG, ATA or ATT). Four PCGs (COX3, ND3, ND4 and ND4L) end with incomplete stop codon (T- -). Four PCGs (ND1, ND4, ND4L and ND5) are encoded on the light strand (underlined below). Refer to the pancrustacean ground pattern, there are not less than seven tRNAs rearranged in the S. amaryllis mitochondrial genome, including tRNA(Ala), tRNA(Glu)/tRNA(Ser)((AGY)), tRNA(Pro)/tRNA(Thr), tRNA(Pro)/tRNA(Thr), tRNA(Tyr), tRNA(Lys), tRNA(Gln) and tRNA(Cys). Three tRNAs (tRNA(Lys), tRNA(Gln) and tRNA(Cys)) are rearranged between S. amaryllis and Tetraclita japonica (Sessilia: Tetraclitidae), meanwhile one tRNA (tRNA(Cys)) inverted from one strand to another. Compared with Megabalanus volcano (Sessilia: Balanidae), an inversion of one large gene block is identified (including three PCGs and three tRNAs) in S. amaryllis mitochondrial genome: tRNA(Phe)-ND5-tRNA(His)-ND4-ND4L-tRNA(Pro).