paenibacillaceae paenibacillaceae the paenibacillaceae are a family of gram-positive bacteria. paenibacillaceae a colony generated by the branching (tip splitting) morphotype bacteria of p. dendritiformis. scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: paenibacillaceaegarrity et al. 2001 genera ammoniibacillus aneurinibacillus group ammoniphilus aneurinibacillus oxalophagus brevibacillus chengkuizengella cohnella fontibacillus gorillibacterium longirhabdus marinicrinis paenibacillus paludirhabdus saccharibacillus thermobacillus xylanibacillus