desulfovibrionales desulfovibrionales desulfovibrionales are a taxonomic order of bacteria belonging to the phylum thermodesulfobacteriota, with four families. they are gram-negative. the majority are sulfate-reducing, with the exception of lawsonia and bilophila. all members of this order are obligately anaerobic. most species are mesophilic, but some are moderate thermophiles. desulfovibrionales desulfovibrio vulgaris scientific classification domain: bacteria phylum: thermodesulfobacteriota class: desulfovibrionia order: desulfovibrionaleswaite et al. 2020 families desulfohalobiaceae desulfomicrobiaceae desulfonatronaceae desulfonatronovibrionaceae desulfonauticaceae desulfoplanetaceae desulfovibrionaceae desulfothermaceae synonyms "sporovibrionales" prévot 1940 phylogeny the currently accepted taxonomy is based on the list of prokaryotic names with standing in nomenclature (lpsn) and national center for biotechnology information (ncbi) 16s rrna based ltp_01_2022 120 marker proteins based gtdb 07-rs207 desulfohalobiaceae desulfothermaceae desulfonauticaceae desulfomicrobiaceae desulfoplanetaceae desulfonatronovibrionaceae desulfonatronaceae desulfovibrionaceae desulfothermaceae galushko & kuever 2021 desulfohalobiaceae kuever, rainey & widdel 2006 desulfoplanetaceae corrig. waite et al. 2020 desulfomicrobiaceae kuever, rainey & widdel 2006 desulfonauticaceae waite et al. 2020 desulfonatronovibrionaceae waite et al. 2020 desulfonatronaceae corrig. kuever, rainey & widdel 2006 desulfovibrionaceae kuever, rainey & widdel 2006