beijerinckiaceae beijerinckiaceae the beijerinckiaceae are a family of hyphomicrobiales named after the dutch microbiologist martinus willem beijerinck. beijerinckia is a genus of free-living aerobic nitrogen-fixing bacteria. acidotolerant beijerinckiaceae has been shown to be the main bacterial methanol sink in a deciduous forest soil and highlights their importance for the conversion of methanol in forest soils. beijerinckiaceae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: beijerinckiaceaegarrity et al. 2006 genera beijerinckia derx 1950 (approved lists 1980) methylocapsa dedysh et al. 2002 methylocella dedysh et al. 2000 methyloferula vorobev et al. 2011 methylorosula berestovskaya et al. 2012 methylovirgula vorob'ev et al. 2009 pseudochelatococcus kämpfer et al. 2015 together with methylocystaceae they are alphaproteobacterial methanotrophs.