Abstract
The mitogenome of Sellanucheza jaegeri was 15,623 bp long, revealed the same gene order to that of typical Polydesmida. Both the tRNA(Ser)(AGN) and tRNA(Ser)(UCN) lacked the DHU arms. No tandem repeat was found in two control regions. Phylogenetic analysis indicated that Sphaerotheriida was so antiquity that divided out earlier than others. We supported that Polydesmida had a relatively systematic affinity between Julida and Playtdesmida, and suggested that the interordinal phylogenetic relationships within Diplopoda should be further investigated.