Tuerkayana is of particular interest because it has been separated, in recent years, from
Cardisoma and
Discoplax but studies of its taxonomic status, especially from a whole mitochondrial genome perspective, have been lacking. In this study, the mitogenomes of four species (
Tuerkayana
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Tuerkayana is of particular interest because it has been separated, in recent years, from
Cardisoma and
Discoplax but studies of its taxonomic status, especially from a whole mitochondrial genome perspective, have been lacking. In this study, the mitogenomes of four species (
Tuerkayana magnum,
Tuerkayana rotundum,
Tuerkayana hirtipes, and
Tuerkayana celeste) of
Tuerkayana are sequenced and contrasted with other species in Brachyura for the first time. The phylogenetic tree of Brachyura, which includes 206 crab species (189 species of Brachyuran and 17 Anomura species) with a complete mitogenome, was constructed to evaluate the phylogenetic position of
Tuerkayana and Gecarcinidae within Brachyuran, and explore the monophyly of Gecarcinidae. Furthermore, two single gene trees based on
cox1 and
16SrRNA separately within interspecies of Gecarcinidae were reconstructed, providing molecular evidence for
Tuerkayana and further clarifying the division of genera in Gecarcinidae. Based on the mitogenome dataset of 206 crabs, the branch-site model was utilized to explore selective pressure in individual codons with CodeML. The strong selective pressure shown in
nad6 indicates that it may have played a significant role in the evolution of Gecarcinidae.
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