Proposal to modify Rule 27 of the International Code of Nomenclature of Prokaryotes Oren, Aharon and Garrity, and George M.,, 65, 2342-2342 (2015), doi = https://doi.org/10.1099/ijs.0.000288, publicationName = Microbiology Society, issn = 1466-5026, abstract= We propose emendation of Rule 27(2)(b) of the International Code of Nomenclature of Prokaryotes so that for new combinations the basonym and its reference must be given. We also propose minor changes to Note 1 and Note 2 of Rule 27., language=, type=