AUTHOR=Li Yue-Tian , Xin Zhao-Zhe , Tang Ying-Yu , Yang Ting-Ting , Tang Bo-Ping , Sun Yue , Zhang Dai-Zhen , Zhou Chun-Lin , Liu Qiu-Ning , Yu Xiao-Min 

TITLE=Comparative Mitochondrial Genome Analyses of Sesarmid and Other Brachyuran Crabs Reveal Gene Rearrangements and Phylogeny

JOURNAL=Frontiers in Genetics

VOLUME=11

YEAR=2020

URL=https://www.frontiersin.org/journals/genetics/articles/10.3389/fgene.2020.536640

DOI=10.3389/fgene.2020.536640

ISSN=1664-8021

ABSTRACT=<p>Mitochondrial genomes (mitogenomes) are important for understanding molecular evolution and phylogenetic relationships. The complete mitogenome of <italic>Perisesarma bidens</italic> was determined, which is 15,641 bp in length. The A + T content of <italic>P. bidens</italic> mitogenome was 74.81%. The AT skew was slightly negative (−0.021). The 22 tRNAs ranged from 65 to 73 bp and were highly A + T biased. All tRNA genes had typical cloverleaf structures, except for the <italic>trnS1</italic> gene, which lacked a dihydrouridine (DHU) arm. The gene order within the <italic>P</italic>. <italic>bidens</italic> mitogenome was identical to the pancrustacean ground pattern, except for the translocation of the <italic>trnH</italic>. Additionally, the gene order of <italic>trnI-trnQ-trnM</italic> in pancrustacean ground pattern became <italic>trnQ-trnI-trnM</italic> in <italic>P. bidens</italic>. Phylogenetic analyses supported the inclusion of <italic>P</italic>. <italic>bidens</italic> in Sesarmidae and the promotion of Sesarminae to Sesarmidae. The results will help us to better understand the status and evolutionary history of Grapsoidea crabs.</p>