Complete mitochondrial genomes and phylogenetic relationships of two <i>Saussurella</i> species (Orthoptera: Tetrigidae) from China

The complete mitochondrial genomes of <i>Saussurella cornuta</i> (Haan, 1843) and <i>Saussurella longiptera</i> (Yin, 1984) were sequenced and analyzed. The circular mitogenomes of <i>S. cornuta</i> and <i>S. longiptera</i> are 16,531 bp and 16,313 bp in length, respectively. The nucleotide compositions are significantly biased toward AT, with AT contents of 69.9% in <i>S. cornuta</i> and 72.2% in <i>S. longiptera.</i> Phylogenetic analysis reveals that <i>S. longiptera</i> represents the earliest branching species within the genus <i>Saussurella</i>, with <i>Saussurella borneensis</i> and <i>S. cornuta</i> forming a sister group. These mitochondrial genomes are provide valuable insights for studying the systematics of <i>Saussurella</i>.