| china | guangdong | nitrosomonadaceae bacterium | species | 2 | 0 |
| ecuador | galapagos province | marine bacterium c-17 | species | 1 | 0 |
| egypt | | nitrosococcus mobilis | species | 1 | 0 |
| germany | baden-wuerttemberg | nitrosomonadaceae bacterium | species | 1 | 0 |
| japan | shiga prefecture | nitrosomonadaceae bacterium | species | 98 | 0 |
| japan | tokyo prefecture | nitrosococcus mobilis | species | 2 | 0 |
| new zealand | auckland | nitrosomonadaceae bacterium | species | 1 | 0 |
| russia | irkutsk oblast | nitrosomonadaceae bacterium | species | 2 | 0 |
| united states | | estuarine bacterium b19-i-nh4 | species | 1 | 0 |
| united states | | estuarine bacterium ta 921-i-nh4 | species | 1 | 0 |
| united states | maine | marine bacterium c-45 | species | 1 | 0 |
| united states | minnesota | nitrosococcus mobilis | species | 3 | 0 |
| united states | ohio | nitrosomonadaceae bacterium | species | 1 | 0 |
| united states | virginia | estuarine bacterium b19-i-nh4 | species | 1 | 0 |
| united states | virginia | estuarine bacterium ta 921-i-nh4 | species | 1 | 0 |