| uncultured caldivirga sp. | no rank | | | species | 1434682 |
| uncultured pyrobaculum sp. | no rank | archaea | environmental samples | species | 398234 |
| uncultured thermoproteus sp. | no rank | archaea | environmental samples | species | 310086 |
| uncultured vulcanisaeta sp. | no rank | archaea | environmental samples | species | 310064 |