This article is a Validation List No. 79 published in the International Journal of Systematic and Evolutionary Microbiology, documenting the formal valid publication of new bacterial names and combinations that were previously published elsewhere. The list validates thirteen new bacterial taxa, including five new Acetobacter species or combinations, one new Desulfovibrio species, a new genus Halonatronum with its species, and several other newly named organisms such as Heliorestis baculata, Leuconostoc gasicomitatum, Mycobacterium heckeshornense, Paenibacillus granivorans, Prochlorococcus marinus (a new genus), and Pyrobaculum arsenaticum. The validation process ensures that these names meet all requirements for proper bacteriological nomenclature under the International Code of Nomenclature of Bacteria. The date of valid publication is the date of this list, not the original publication date. Each validated name includes nomenclatural type information and culture collection strain designations, enabling standardization of microbial taxonomy across international culture collections.

Key findings

• Thirteen new bacterial names and combinations were validly published, including five Acetobacter taxa reclassified from subspecies to species or combinations
• A new bacterial genus Halonatronum was established with the species H. saccharophilum isolated from Lake Magadi
• Prochlorococcus marinus, an oxyphototrophic marine prokaryote, was validated as a new genus and species along with a new subspecies P. marinus subsp. pastoris
• The validation date is the publication date of this list, establishing formal nomenclatural standing for previously published names
• All validated organisms have designated nomenclatural types maintained in international culture collections (ATCC, DSM, JCM, LMG, etc.)