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| Species | OMA ID | Cross-ref | OMA Group | (size) |
| [A] Metallosphaera sedula (strain ATCC 51363 / DSM 5348) | METS51398 |  A4YGM3 | 40424 | (19) |
| [A] Pyrobaculum aerophilum | PYRAE2410 | Q8ZT56 | 40424 | (19) |
| [A] Pyrobaculum islandicum (strain DSM 4184 / JCM 9189) | PYRIL958 | A1RT62 | 40424 | (19) |
| [A] Pyrobaculum calidifontis (strain JCM 11548 / VA1) | PYRCJ1023 | A3MUZ6 | 40424 | (19) |
| [A] Thermoproteus neutrophilus (strain DSM 2338 / JCM 9278 / V24Sta) | THENV1276 | B1Y906 | 40424 | (19) |
| [A] Pyrobaculum arsenaticum (strain DSM 13514 / JCM 11321) | PYRAR1809 | A4WM12 | 40424 | (19) |
| [A] Sulfolobus tokodaii | SULTO888 | Q973S9 | 40424 | (19) |
| [A] Sulfolobus acidocaldarius | SULAC1113 | Q9HH97 | 40424 | (19) |
| [A] Sulfolobus solfataricus | SULSO892 | C5SUX2 | 40424 | (19) |
| [A] Sulfolobus islandicus (strain L.S.2.15 / Lassen #1) | SULIL1165 | C3MPL9 | 40424 | (19) |
| [A] Sulfolobus islandicus (strain Y.G.57.14 / Yellowstone #1) | SULIY1175 | C3NDV0 | 40241 | (95) |
| [A] Sulfolobus islandicus (strain Y.N.15.51 / Yellowstone #2) | SULIN1496 | C3NHV3 | 40241 | (95) |
| [A] Sulfolobus islandicus (strain M.14.25 / Kamchatka #1) | SULIM1089 | C3MYL1 | 40424 | (19) |
| [A] Sulfolobus islandicus (strain M.16.27) | SULIA1136 | C3N596 | 40424 | (19) |