| Synonymous name | : | Thermodesulfobiota (Phylum) Frolov et al. 2023 | |
Ref: Species 2000, 2001-present: 10 Apr 2025. |
| Synonymous name (objective) | : | Firmicutes (Phylum) (Gibbons and Murray 1978) Garrity and Holt 2001 stat. inval. | |
Ref: LPSN, 2020-present: [2 Jan 2026] ("homotypic"). |