Analysis of complete mitochondrial genome of Etisus anaglyptus (Arthropoda, Decapoda, Xanthidae) with phylogenetic consideration.

The complete mitochondrial genome is sequenced and analyzed from a xanthid crab Etisus anaglyptus, which is the first complete mitochondrial genome for the genus. The mitochondrial genome length of E. anaglyptus is 16,435 bp and it is composed of 13 protein coding genes, two ribosomal RNA genes, and 22 tRNA genes. The structure and gene orientation of the mitochondrial genome is identical with the other brachyuran records. Furthermore, phylogenetic relationships of the infraorder Brachyura evaluated by mitochondrial protein coding genes. The phylogenetic study showed that E. anaglyptus is positioned in the superfamily Xanthoidea and the closest species to E. anaglyptus is Leptodius sanguineus.

Complete mitochondrial genome of xanthid crab Atergatis floridus (Linnaeus, 1767).

The complete mitochondrial genome sequenced from the floral egg crab Atergatis floridus (Linnaeus, 1767) and the determination of the position of the species in the reconstructed phylogenetic tree of the infraorder Brachyura using the protein coding mitochondrial genes are presented. Results show the mitochondrial genome length of A. floridus is 16,435 bp with nucleotide distribution as 33.4% A, 20.3% C, 10.5% G and 35.8% T. The structure of the complete mitochondrial genome of the species is the same as with the previous xanthid record. The result of the phylogenetic analysis suggests that A. floridus is the closest species to other Xanthidae species in the brachyuran records. This is the first complete mitochondrial genome record from the genus Atergatis.

Complete mitochondrial genome of Atergatis integerrimus (Decapoda, Xanthidae) from the Philippines.

In this study, a complete mitochondrial genome from the red egg crab, Atergatis integerrimus was sequenced and analyzed. The mitochondrial genome length is 16,333 bp and is composed of 13 protein-coding, two ribosomal RNA and 22 tRNA genes. The structure and gene orientation of the mitochondrial genome was found to be identical with the other brachyurans. The position of A. intergerrimus in the superfamily Xanthoidea was determined based on the mitochondrial protein-coding genes. The result of the phylogenetic relationship study showed that A. integerrimus was closest to Leptodius sanguineus.

The complete mitochondrial genome of Hemigrapsus penicillatus (De Haan, 1835) (Decapoda, Varunidae).

Hemigrapsus penicillatus is a small grapsoid crab which is found in Japan, Taiwan, Korea, and China coasts. In this study a complete mitogenome of Korean H. penicillatus was analyzed and phylogenetic relationships in the family Varunidae were investigated. The mitogenome size is 16,486 bp with 34.1% A, 18.1% C, 11.4% G, and 36.4% T nucleotide distributions. Genome structure and gene orientations are identical with previous records from the family and mitochondrial protein-coding gene based phylogenetic tree suggested that the closest species to H. penicillatus is H. sanguineus. This is the second complete mitogenome record from the genus Hemigrapsus and the first record for the species.