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.

Desulfonatronovibrio is a Gram-negative, vibrios, anaerobic and motile genus of bacteria from the family Desulfohalobiaceae with a single polar flagellum.