Ferroglobus placidus

Thomson RE, Delaney JR (2001) Evidence for a weakly stratified Europan oceans sustained by seafloor heat flux. J Geophys Res 106 12,355-12,365 Tor JM, Lovley DR (2001) Anaerobic degradation of aromatic compounds coupled to Fe(III) reduction by Ferroglobus placidus. Environ Microbiol 3 281-287... 

Hafenbradl D., Keller M., Dirmeier R., Rachel R., RoBnagel P., Burggraf S., Huber H., and Stetter K. O. (1996) Ferroglobus placidus gen. nov., sp. nov. a novel hyperthermophilic archaeum that oxidizes Fe at neutral pH under anoxic conditions. Arcli. Microbiol. 166, 308-314. 

Fig. 1.10. A schematic presentation of the mechanisms by which Ferroglobus placidus and Dechlorosoma suillum acquire energy and biosynthesize organic compounds...

Furthermore, a bacterium has been found that oxidizes ferrous compounds to ferric hydroxide with nitrate and produces nitrite, hydrogen carbonate ion, and proton [reaction (5.13)]. The bacterium is called Ferroglobus placidus, an archaeon growing at 65-95°C (Hafenbradl et al., 1996). This bacterium thus produces ferric hydroxide without molecular oxygen or light. 

---