This is Validation List No. 76 from the International Journal of Systematic and Evolutionary Microbiology, which officially validates ten newly named bacterial species that were previously published in other journals. The validation process allows authors to obtain formal recognition of new bacterial names and combinations in bacteriological nomenclature. The list includes diverse bacterial taxa: two Arthrobacter species (albus and luteolus) from human clinical specimens; several sulfate-reducing and sulfur-metabolizing bacteria (Desulfocapsa, Desulforhopalus, Desulfovibrio, and Desulfuromonas); Eubacterium aggregans from olive mill wastewater; Helicobacter mesocricetorum from Syrian hamster feces; and two thermophilic bacteria (Thermosipho japonicus from deep-sea hydrothermal vents and Thermotoga subterranea from an oil reservoir). Each validated name is assigned a nomenclatural type strain maintained in international culture collections. The effective publication date is the validation list publication date, not the original publication date, and validation does not necessarily imply permanent taxonomic acceptance, as organisms may later be reclassified or names may become synonyms.

Key findings

• Ten new bacterial species names were formally validated for bacteriological nomenclature through this list
• The validated species include clinically relevant bacteria, anaerobic sulfur-metabolizers, and thermophilic organisms from diverse environments
• Each validated species has an assigned nomenclatural type strain maintained in recognized international culture collections (DSM, ATCC, or JCM)
• Validation establishes the official publication date as the list publication date rather than the original publication date in other journals
• Taxonomic validity through this list does not preclude future reclassification or synonymization of the organisms