RT Journal Article SR Electronic(1) A1 Boden, Rich A1 Oren, AharonYR 2017 T1 Proposal to designate Methylothermus subterraneus Hirayama et al. 2011 as the type species of the genus Methylothermus. Request for an Opinion JF International Journal of Systematic and Evolutionary Microbiology, VO 67 IS 9 SP 3685 OP 3685 DO https://doi.org/10.1099/ijsem.0.002208 PB Microbiology Society, SN 1466-5034, AB Methylothermus thermalis , the designated type species of the genus Methylothermus , is not available from culture collections and its nomenclatural type is a patent strain. According to Rule 20a of the International Code of Nomenclature of Prokaryotes, only species whose names are legitimate may serve as types of genera. Therefore, the name Methylothermus and the names of the species Methylothermus thermalis and Methylothermus subterraneus are not validly published and are illegitimate. We therefore submit a Request for an Opinion to the Judicial Commission of the ICSP to consider the later-named Methylothermus subterraneus as the new type species of the genus Methylothermus based on Rule 20e(2)., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.002208