The complete mitochondrial genomes of two imperiled species endemic to the Southwestern United States: Peppered Chub ( Macrhybopsis tetranema ) and Gila Trout ( Oncorhynchus gilae ).

and are fish species endemic to the Southwestern United States. We present the complete mitochondrial genomes for these species. Each genome consisted of 13 protein-coding genes, two ribosomal (rRNA) genes, 22 transfer RNA (tRNA) genes, and the control region (D-loop). Mitogenome lengths were 16,916 base pairs (bp) for , and 16,976 bp for The GC content was 41% for and 46% for . The relationships of and were consistent with previous phylogenetic analyses.