Desulfovibrionaceae
Desulfovibrio
Bilophila
Lawsonia
Desulfohalobiaceae
Desulfohalobium
Desulfomonas
Desulfonatronovibrio
Desulfomicrobiaceae
Desulfomicrobium
Desulfonatronumaceae
Desulfonatronum
The Desulfovibrionales are an order of Proteobacteria, with four families. The majority are sulfate-reducing, with the exception of Lawsonia and Bilophila .