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| Species | OMA ID | Cross-ref | OMA Group | (size) |
| [B] Rickettsia bellii (strain OSU 85-389) | RICB81415 |  A8GYB2 | 183885 | (45) |
| [B] Rickettsia bellii (strain RML369-C) | RICBR1368 |  AK_RICBR | 183885 | (45) |
| [B] Rickettsia felis | RICFE1159 | AK_RICFE | 183885 | (45) |
| [B] Rickettsia canadensis (strain McKiel) | RICCK931 | A8EZV3 | 183885 | (45) |
| [B] Rickettsia typhi | RICTY704 | AK_RICTY | 183893 | (2) |
| [B] Rickettsia akari (strain Hartford) | RICAH1031 | A8GPP7 | 183885 | (45) |