Methanocalculus halotolerans is a species of archaeon, the type species of its genus. It is an irregular coccoid hydrogenotrophicmethanogen. Its type strain is SEBR 4845T (= OCM 470T).[1]
Nomenclature
The name "Methanocalculus" has Latin roots, "methano" for methane and "calculus" for small round structure, "halo" for salt and "tolerans" for tolerant. In all, the name means salt-tolerant organism with a gravelly body that produces methane.[2]