Notification that new names and new combinations have appeared in volume 49, part 3, of the IJSB

This document is a notification list published in the International Journal of Systematic Bacteriology (IJSB) in 1999, cataloging newly proposed bacterial names and combinations that appeared in volume 49, part 3. The list serves as a service to the bacteriology community for recognizing new nomenclature according to priority rules based on publication page numbers. The notification includes over 50 new bacterial taxa across diverse groups, including anaerobes (Haloanaerobium, Thermanaerovibrio), thermophiles (Caldicellulosiruptor), sulfur-metabolizers (Sulfurospirillum), and clinically relevant species such as Mycobacterium tuberculosis subspecies and Streptococcus pluranimalium. Many entries represent either new species descriptions (sp. nov.), new genera (gen. nov.), or new combinations (comb. nov.) assigning previously named organisms to newly established genera. The list also includes emendations and synonymizations of existing names, reflecting ongoing taxonomic refinement. Notable inclusions are several Caulobacter reclassifications into the new genus Brevundimonas, and the first description of 'Candidatus Phytoplasma japonicum', representing uncultured microorganisms. This standardized notification procedure, proposed by the Judicial Commission, facilitates tracking of bacterial nomenclatural changes in the scientific literature.

Key findings

• Over 50 new bacterial taxa were validly published in IJSB volume 49, part 3, including new species, genera, and combinations across diverse metabolic groups
• Multiple Caulobacter species were reclassified into newly established genera including Brevundimonas and Maricaulis, reflecting phylogenetic reorganization
• The list includes clinically important bacteria such as new subspecies of Mycobacterium tuberculosis and Bacillus subtilis, established through automatic subspecific designations
• New thermophilic and anaerobic bacterial genera were described, including Thermanaerovibrio, Caldicellulosiruptor, and Fusibacter
• The notification system provides standardized documentation of bacterial nomenclatural priority based on IJSB publication page numbers