| murine pneumotropic virus | species | viruses and viroids | viruses | species | 229278 |
| mus musculus polyomavirus 2 | species | | | species | 1891770 |
| polyomavirus sp. | no rank | viruses and viroids | viruses | species | 36362 |
| rattus norvegicus polyomavirus 1 | species | | | species | 1679933 |
| rattus norvegicus polyomavirus 2 | species | | | species | 1919247 |