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The complete mitochondrial DNA genome of Devario interruptus was sequenced on the Illumina HiSeq platform and found to be 16,735 bp and included 37 genes encoding 13 proteins, 22 tRNAs, two rRNAs, and two non-coding regions. The proportion of nucleotides in mitochondrial genome was T (27.9%), C (23.7%), A (33%), G (15.4%), and the deviation of AT was 60.9%. A Maximum-Likelihood phylogenetic tree was reconstructed using the concatenated mitochondrial protein-coding genes of D. interruptus and other 18 species of fishes. Phylogenetic analysis results supported that D. interruptus was closely related to Devario shanensis . Fundamental genetic data of D. interruptus will be essential for further genetic studies., Competing Interests: No potential conflict of interest was reported by the author(s)., (© 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.)

Here, we sequenced the complete mitogenome of Rhinogobius szechuanensis using the Illumina HiSeq platform and submitted the genome to Genbank with accession number OM617727. Assembly circular mitogenome (16,492 bp) consisted of 54.4% AT content, 13 protein-coding genes, 22 tRNA genes, two rRNA genes, an origin of light-strand replication, and a control region. Phylogenetic analysis supported that R. szechuanensis was grouped with R. rubromaculatus and clustered with other Rhinogobius species. The basal molecular data will be essential for further genetics studies such as evolution, taxonomy, DNA barcoding, and population genetics of Rhinogobius., Competing Interests: No potential conflict of interest was reported by the author(s)., (© 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.)

This study sequenced and annotated the complete mitochondrial genome sequence of Rhinogobius filamentosus , an endemic species in China. The complete mitochondrial genome was 16,510 base pairs long and contained 13 protein-coding genes (PCGs, 11,414 bp), 22 tRNA genes (1,555 bp), two rRNA genes (2,615 bp), two non-coding regions (D-loop: control region displacement loop, 478 bp; OL: origin of L-strand replication, 30 bp). The overall base composition of the genome was estimated to be T (25.4%), C (30.2%), A (27.6%) and G (16.7%), showing an AT bias (53%). Phylogenetic analyses revealed that the genus Rhinogobius included two clades. For one clade, R. filamentosus clustered with R. duospilus , and they formed a sister-group relationship with other ten Rhinogobius species. This work would be essential in revealing the evolutionary relationships in Gobionellinae., Competing Interests: The authors declare no potential conflict of interest., (© 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.)

This study aimed to sequence and annotate the complete mitochondrial DNA genome sequence of Traccatichthys pulcher . The mitochondrial genome comprised 16,583 bp, harboring 13 protein-coding genes (PCGs), 22 tRNA genes, two rRNA genes, and a control region. The whole genome contained T (25.8%), C (26.9%), A (31.4%), and G (15.9%), showing an obvious AT bias (57.2%). Based on the concatenated protein sequences of 13 PCGs, a phylogenetic tree was reconstructed by the maximum likelihood method, and the topology revealed the monophyly of Traccatichthys , and the gathering of T. pulcher and M. pulcher . The mitochondrial DNA of T. pulcher (MZ853162.1) and M. pulcher (NC_031581.1) were aligned by the BLAST 2 sequences tool, which showed 97% similarity., Competing Interests: No potential conflict of interest was reported by the author(s)., (© 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.)

This study aimed to sequence and annotate the complete mitochondrial DNA genome sequence of Opsarius pulchellus. Complete mitochondrial genome is a circular molecule of 16,552 bp in length, including 13 protein-coding genes (PCGs), 22 tRNA genes, two rRNA genes, and a displacement loop region. Proportion of nucleotides in mitochondrial genome is 26.8% T, 26.9% C, 27.6% A, and 18.8% G, with an AT bias of 54.4%. Maximum-likelihood phylogenetic tree was reconstructed using the connected protein sequences of 13 PCGs of O. pulchellus and other 18 fishes. Result of phylogenetic analysis supports a close relationship between O. pulchellus and Barilius bendelisis (Hamilton, 1807). Fundamental genetic data of O. pulchellus would be beneficial for further studies on genetic diversity and phylogeny., Competing Interests: No potential conflict of interest was reported by the author(s)., (© 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.)

Family of Gastromyzontidae originates from China and Southeast Asia, which is widely distributed in the southern part of the Yangtze River. In this study, we sequenced seven fish complete mitogenomes from three of all 18 genera in the Gastromyzontidae on the Illumina HiSeq platform. Lengths of seven complete mitochondrial genome sequences varied from 16,554 to 16,574 bp, with an AT bias of 53.6-54.9%. Maximum-likelihood phylogenetic tree was reconstructed using the connected protein sequences of 13 protein-coding genes of 34 species of fish. The phylogeny revealed that the genera Gastromyzon , Sewellia , and Erromyzon were monophyletic, and other genera Beaufortia , Vanmanenia , Formosania , and Pseudogastromyzon were paraphyletic or polyphyletic. Phylogeny corrected the taxonomic status of Metahomaloptera omeiensis , which should be categorized under the family of Gastromyzontidae rather than Balitoridae, denoting the significance of this study to the overall fisheries research., Competing Interests: The authors declare no potential conflict of interest., (© 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.)