The Mitochondrial Genome of the Globally Invasive Barnacle Megabalanus coccopoma Darwin 1854 (Crustacea: Balanomorpha): Rearrangement and Phylogenetic Consideration within Balanomorpha

Megabalanus coccopoma (Darwin, 1854) is a globally invasive species in Balanomorpha (Crustacea). This model organism for studying marine pollution and ecology. However, its mitogenome remains unknown. The sequencing of M. completed the present study. It has 15,098 bp length, including 13 protein-coding genes (PCGs), 2 ribosomal RNAs (rRNAs), 22 transfer (tRNAs), along with putative regulatory area. A substantial A+T bias was observed genome composition (68.2%), negative AT (0.82) GC (−0.136) skew. Compared to gene sequence ground pan-crustacea, clusters (or genes), such as 10 tRNAs 3 PCGs, were different order. line previously large-scale rearrangements Balanomorpha. Among 37 genes, cluster (M-nad2-W-cox1-L2-cox2-D-atp8-atp6-cox3-G- nad3-R-N-A-E-S1) conserved. Furthermore, phylogeny analysis indicated that existing family divided into nine rearrangement patterns, supporting polyphyly Balanoidea.