Leptospirillum gen. nov. (ex Markosyan 1972), nom. rev., including Leptospirillum ferrooxidans sp. nov. (ex Markosyan 1972), nom. rev. and Leptospirillum thermoferrooxidans sp. nov. (Golovacheva et al. 1992).

The name Leptospirillum ferrooxidans is not in the Approved Lists of Bacterial Names (1980), nor has it been subsequently validly published. In accordance with the rules of the International Code of Nomenclature of Bacteria, the name Leptospirillum for the genus (gen. nov., nom. rev.) and Leptospirillum ferrooxidans for the species (sp. nov., nom. rev.) is revived here. The type species is Leptospirillum ferrooxidans strain L15T (= DSM 2705T). The second species in the genus is Leptospirillum thermoferrooxidans (Golovacheva et al. 1992) (type strain L-88T; Institute of Microbiology, INMI, Moscow, Russia).