Halothiobacillus

Halothiobacillus halophilus
Halothiobacillus hydrothermalis
Halothiobacillus kellyi
Halothiobacillus neapolitanus
Halothiobacillus is a genus of Proteobacteria. The members of this genus used to belong to Thiobacillus, before they were reclassified in the year 2000. They are now classified with the purple sulfur bacteria.

References

Kelly, D.P., and Wood, A.P. "Reclassification of some species of Thiobacillus to the newly designated genera Acidithiobacillus gen. nov., Halothiobacillus gen. nov. and Thermithiobacillus gen. nov." Int. J. Syst. Evol. Microbiol. (2000) 50:489-500.