Complete mitochondrial genome and the phylogenetic position of the snaggletooth shark Hemipristis elongata (Carcharhiniformes: Hemigaleidae)

Abstract

In this study, we first present the complete mitochondrial genome of Hemipristis elongata , the only member of genus Hemipristis in family Hemigaleidae. It is 16,691 bp in length with the typical gene order invertebrates. Its overall base composition is 31.7% A, 24.1% C, 12.9% G and 31.3% T. Two start codons (ATG and GTG) and three stop codons (TAG, AGA and TAA/T) are found in the protein-coding genes. The 22 tRNA genes ranged from 67 bp (tRNA- Cys , tRNA- Ser 2) to 75 bp (tRNA- Leu 1). The phylogenetic result showed that H. elongata was clustered to Hemigaleus microstoma and formed Hemigaleidae.