This document is Validation List No. 84 from the International Journal of Systematic and Evolutionary Microbiology, published in 2002. It announces the valid publication of ten new bacterial names and combinations that were previously published elsewhere but require formal validation. The list includes three new Acetobacter species (A. cibinongensis, A. orientalis, and A. syzygii) isolated from Indonesian sources, two Helicobacter species (H. aurati and H. canadensis) associated with gastrointestinal infections, three Nocardiopsis species (N. vinacea, N. exhalans, and N. umidischolae), one Nocardia species (N. vinacea), one Bacillus species (B. thermantarcticus) from Antarctica, and one Alicyclobacillus subspecies (A. acidocaldarius subsp. rittmannii). Each entry specifies the original authors, nomenclatural types, and culture collection strain designations. The validation process ensures these names are officially recognized in bacterial nomenclature, though validation does not constitute taxonomic acceptance and names may later prove to be synonyms or require reclassification.

Key findings

• Ten new bacterial names and combinations received valid publication through this validation list, including species from Acetobacter, Helicobacter, Nocardiopsis, Nocardia, Bacillus, and Alicyclobacillus genera
• Three Acetobacter species were isolated from Indonesian sources and formally named
• Helicobacter canadensis and H. aurati were isolated from human and hamster gastrointestinal tissues respectively
• Bacillus thermantarcticus originated from Antarctica, while Alicyclobacillus and Nocardiopsis species were isolated from geothermal and indoor environments