Methanosarcina subterranea Shimizu et al. 2015 Shimizu S. Ueno A. Naganuma T. Kaneko K. Methanosarcina subterranea sp. nov., a methanogenic archaeon isolated from a deep subsurface diatomaceous shale formation 2015 65 4 1167 1171 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.000072 25604340