A.mi.no.mo'nas. N.L. neut. n. aminum amine; Gr. n. monas a unit, monad; N.L. fem. n. Aminomonas aminedegrading monads. Synergistetes / Synergistia / Incertae Sedis / Incertae Sedis / Aminomonas Cells are strictly anaerobic, nonsporeforming, nonmotile, slightly curved rods, occurring singly or in pairs. Gram‐stain‐negative . Mesophilic, neutrophilic. Optimum growth at 35°C and pH 7.5 on arginine with a generation time of 16 h. Heterotrophic . Good growth on arginine, histidine, threonine, and glycine. Acetate is the end product formed from all these substrates; in addition, trace amount of formate is detected from arginine and histidine. Ornithine is produced from arginine. Slow growth on glutamate with production of acetate, carbon dioxide, formate, hydrogen, and traces of propionate as the end products. In syntrophic association with Methanobacterium formicicum , methane is produced from arginine, histidine, and glutamate which are oxidized into propionate as the major product together with acetate and carbon dioxide. Alanine and the branched‐chain amino acids valine, leucine, and isoleucine are not degraded either in pure culture or in association with Methanobacterium formicicum . DNA G + C content ( mol %): 43. Type species : Aminomonas paucivorans Baena, Fardeau, Ollivier, Labat, Thomas, Garcia and Patel 1999a, 981 VP .