The complete mitochondrial genome and phylogenetic analysis of Chasmagnathus convexus (Crustacea: Grapsidae)

Abstract

The complete mitochondrial genome of the Chasmagnathus convexus has been determined in this study. The complete genome (mtDNA) was 15,107 bp in length and contained 13 protein-coding genes, 1 rRNA genes, and 22 tRNA genes. The overall base composition of the genome in descending order was 34.2% T, 32.8% A, 20.9% C, and 12.1% G. In 13 protein-coding genes, most of the protein-coding genes start with ATG (COX1, COX2, COX3 and ATP8) and ATT (NAD5, NAD4, NAD4L, NAD6, ATP6 and NAD2), only CYTB, NAD3, and NAD1 genes start with ATA. For the stop codon, only NAD2 end with TAG, the other 12 genes end with TAA. Phylogenetic analysis indicated that C. convexus is closely related to Hemigrapsus penicillatus family. It would be a supplement for the genetic analysis of C. convexus and promote the phylogenesis of Grapsidae.