| brazil | | uncultured methanocalculus sp. | species | 3 | 0 |
| china | | methanocalculus sp. enrichment culture clone a2-23 | species | 1 | 0 |
| china | | methanocalculus sp. enrichment culture clone a3-40 | species | 1 | 0 |
| china | | methanocalculus sp. enrichment culture clone a3-53 | species | 1 | 0 |
| china | | methanocalculus sp. enrichment culture clone a4-3 | species | 1 | 0 |
| china | | methanocalculus sp. enrichment culture clone sa2-91 | species | 1 | 0 |
| china | | uncultured methanocalculus sp. | species | 190 | 0 |
| china | shandong | methanocalculus sp. enrichment culture clone l35a_25 | species | 1 | 0 |
| china | shandong | methanocalculus sp. enrichment culture clone l35a_27 | species | 1 | 0 |
| china | shandong | methanocalculus sp. enrichment culture clone l35a_3 | species | 1 | 0 |
| china | shandong | methanocalculus sp. enrichment culture clone l35a_9 | species | 1 | 0 |
| india | | uncultured methanocalculus sp. | species | 10 | 0 |
| india | maharashtra | methanocalculus sp. ca100 | species | 1 | 0 |
| india | maharashtra | methanocalculus sp. la2 | species | 1 | 0 |
| kenya | rift valley province | uncultured methanocalculus sp. | species | 2 | 0 |
| nigeria | | uncultured methanocalculus sp. | species | 15 | 0 |
| russia | altai krai | methanocalculus natronophilus | species | 2 | 0 |
| russia | altai krai | methanocalculus sp. amf-a1 | species | 1 | 0 |
| taiwan | | methanocalculus | genus | 0 | 2 |
| taiwan | | methanocalculus chunghsingensis | species | 1 | 0 |
| united states | alaska | methanocalculus sp. 52_23 | species | 225 | 0 |
| united states | alaska | uncultured methanocalculus sp. | species | 20 | 0 |