This article is a validation announcement from the International Journal of Systematic Bacteriology (IJSB) that formally establishes 15 new bacterial names and combinations as validly published nomenclature. The list includes one new genus (Acetohalobium), one genus reclassification (Methanolacinia), and 13 new bacterial species spanning diverse metabolic types: methanogens, sulfate-reducing bacteria, methylotrophs, halotolerant bacteria, and streptococci. These names were originally published elsewhere but required formal validation through the IJSB to be officially recognized in bacteriological nomenclature. The validation list includes reference strains with their corresponding strain collection designations (DSM, UQM, VKM, etc.). The authors emphasize that validation of a name does not necessarily constitute taxonomic acceptance, as organisms may later be reclassified or renamed. This list is part of an ongoing series (List No. 35) that tracks newly validated bacterial nomenclature to maintain standardization across the microbiology field.

Key findings

• Fifteen new bacterial names and combinations were formally validated through the IJSB, including one new genus (Acetohalobium) and thirteen new species from diverse metabolic groups
• Validated organisms include methanogens, sulfate-reducing bacteria, and halotolerant species isolated from varied environments such as peat bogs, submarine hydrothermal systems, and Antarctic saline lakes
• Validation through IJSB confers official nomenclatural status but does not guarantee permanent taxonomic acceptance, as organisms may be reclassified or transferred to different genera in the future
• Each validated name is linked to reference strains maintained in international culture collections for scientific verification and future research