Table 2. Mitochondrial gene-arrangement breakpoints relative to the hypothetical ancestor of arthropods.
| Superorder | Order | Taxon | Number of breakpoints |
|---|---|---|---|
| Parasitiformes | Ixodida | Argasidae (11 species) | 0 |
| Parasitiformes | Ixodida | Ixodidae (16 species)a | 7 |
| Parasitiformes | Mesostigmata | Stylochyrus rarior | 7 |
| Acariformes | Trombidiformes | Phyllocoptes taishanensis | 13 |
| Parasitiformes | Mesostigmata | Varroa destructor | 14 |
| Acariformes | Trombidiformes | Demodicidae (2 species) | 15 |
| Acariformes | Trombidiformes | Epitrimerus sabinae | 16 |
| Acariformes | Sarcoptiformes | Sarcoptiformes (6 species) | 24 |
| Acariformes | Trombidiformes | Ascoschoengastia sp. | 25 |
| Acariformes | Trombidiformes | Walchia hayashii | 25 |
| Acariformes | Trombidiformes | Unionicola parkeri | 25 |
| Acariformes | Trombidiformes | Unionicola foili | 27 |
| Acariformes | Trombidiformes | Leptotrombidium pallidum | 28 |
| Acariformes | Trombidiformes | Leptotrombidium akamushib | 28 |
| Acariformes | Trombidiformes | Tetranychidae (10 species) | 31 |
| Parasitiformes | Mesostigmata | Phytoseiulus persimilis | 32 |
aIxodes species were not included, due to they have the same mt gene arrangement of Argasidae.
bLeptotrombidium deliense has the same gene arrangement as Leptotrombidium akamushi. All of the mt genomes included for comparison have the full set of 37 genes.