Notification that new names and new combinations have appeared in volume 52, part 2, of the IJSEM. International Journal of Systematic and Evolutionary Microbiology.

This notification list documents newly described bacterial and archaeal species and taxonomic changes published in volume 52, part 2 of the International Journal of Systematic and Evolutionary Microbiology (2002). The list serves as an official registry for new bacterial names and combinations, organized according to bacteriological nomenclature rules. It includes 47 entries covering newly proposed species, genus descriptions, emendations of existing taxa, and nomenclatural changes. Notable entries include new species of Pseudomonas, Bartonella, Mycobacterium, and Ureaplasma, as well as several new genera such as Gelria, Thermomonas, and Salinibacter. The document also records nomenclatural corrections and reclassifications, such as the reclassification of Haemobartonella species into the genus Mycoplasma. Additionally, Helicobacter nemestrinae is designated a synonym of Helicobacter pylori. Several entries include taxonomic emendations and the establishment of subspecies according to Bacteriological Code rules.

Key findings

• A comprehensive list of 47 new bacterial species, genera, and nomenclatural combinations was officially published in IJSEM volume 52, part 2
• Multiple genera were newly described, including Gelria, Thermomonas, Salinibacter, and Thiobaca from diverse bacterial groups
• Several previously named bacteria were reclassified, including the transfer of Haemobartonella species to Mycoplasma and the synonymization of Helicobacter nemestrinae with H. pylori
• Taxonomic emendations clarified subspecies classifications in organisms like Desulfotomaculum thermobenzoicum and Mycobacterium bovis