Abstract
In this study, the complete mitogenome of Lysmata vittata (Crustacea: Decapoda: Hippolytidae) has been determined. The genome sequence was 22003 base pairs (bp) and it included thirteen protein-coding genes (PCGs), twenty-two transfer RNA genes (tRNAs), two ribosomal RNA genes (rRNAs) and three putative control regions (CRs). The nucleotide composition of AT was 71.50%, with a slightly negative AT skewness (-0.04). Usually the standard start codon of the PCGs was ATN, while cox1, nad4L and cox3 began with TTG, TTG and GTG. The canonical termination codon was TAA, while nad5 and nad4 ended with incomplete stop codon T, and cox1 ended with TAG. The mitochondrial gene arrangement of eight species of the Hippolytidae were compared with the order of genes of Decapoda ancestors, finding that the gene arrangement order of the Lebbeus groenlandicus had not changed, but the gene arrangement order of other species changed to varying degrees. The positions of the two tRNAs genes (trnA and trnR) of the L. vittata had translocations, which also showed that the Hippolytidae species were relatively unconserved in evolution. Phylogenetic analysis of 50 shrimp showed that L. vittata formed a monophyletic clade with Lysmata/Exhippolysmata species. This study should be helpful to better understand the evolutionary status, and population genetic diversity of L. vittata and related species.
Highlights
The genus Lysmata is an important group in family Hippolytidae, contains more than 48 described species, most of which are small shrimp living in shallow waters [1,2]
The base distribution of L. vittata (Guangdong) deletion was shown in S1 Fig. The reason for sequence deletion may be related to sequencing method and sequence splicing
We successfully obtained the mitogenome sequence of the L. vittata, which was the first species of the Hippolytidae to publish the mitogenome sequence in the GenBank database
Summary
The genus Lysmata is an important group in family Hippolytidae, contains more than 48 described species, most of which are small shrimp living in shallow waters [1,2]. The classification of Hippolytidae was the most controversial family in Decapoda, especially the monophyly of Hippolytidae and the position of the genus Lysmata [3,4]. In the past few decades, the studies of Lysmata mainly focused on morphology, with relatively few studies on population genetic structure. Most of the selected marker genes are partial.
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