Complete mitochondrial genome of two endemic species to China: Discocheilus wui and Discocheilus wuluoheensis (Cypriniformes, cyprinidae)

Phylogenetic analysis based on the complete mitochondrial genome of Discogobio brachyphysallidos (Cypriniformes: Cyprinidae) suggests the need for taxonomic revision at the genus level

Discogobio brachyphysallidos Huang 1989 is a Cyprinidae fish species that is endemic to the upper Pearl River. In the present study, the complete mitochondrial genome of D. brachyphysallidos collected from the Nanpanjiang River was sequenced and annotated. The mitochondrial genome encompassed 13 protein-coding genes, two ribosomal RNA (rRNA) genes, 22 transfer RNA (tRNA) genes, and the control region (D-loop). The total length of the mitochondrial genome was determined to be 16,594 base pairs (bp), with a GC content of 41.7%. Phylogenetic analyses revealed that D. brachyphysallidos may be a sister to D. longibarbatus and D. macrophysallidos. These findings provide insight into the genetic information and phylogenetic relationships of D. brachyphysallidos.

The complete mitochondrial genome of Paraqianlabeo lineatus (Cyprinidae: Labeoninae)

Paraqianlabeo lineatus is a small-sized fish which is endemic to Guizhou province, China. The complete mitochondrial genome of P. lineatus is 16,598 bp in total length, with 37 genes, including 13 PCGs, 22 tRNA genes, two rRNA genes (16S and 12S) and a non-coding region (D-loop). The positions and sequences of genes were consistent with congeners of Labeoninae. The nucleotide composition of the mitogenome was A (31.5%), T (26.7%), G (15.9%), C (25.8%) and was slightly A + T biased. Phylogenetic analysis conducted using Bayesian Inference method showed that P. lineatus clustered with Pseudogyrincheilus procheilus within the subfamily Labeoninae. The results may provide helpful data for further studies of the evolutionary history of Labeoninae.