Abstract
Mitochondrial genomes of two individuals of Tachanovsky's gudgeon Ladislavia taczanowskii have been determined on the basis of Sanger dideoxy sequencing. The gene compositions of two genomes contain 13 protein-coding genes, 2 rRNA genes, 22 tRNA genes, and 1 control region with the same length 16,614 bp. The phylogenetic tree reveals that the monotypic genus Ladislavia is a sister group of the subfamily Gobioninae within the family Gobionidae.