In view of the current confusion about the correct gender of genus names ending on , and possible confusion in the future for genus names ending on , we propose non-retroactive addenda to Rule 65(2) and Appendix 9 of the International Code of Nomenclature of Prokaryotes so that new genera to be formed by adding the ending to the stem of an existing genus name or another (Neo-) Latin word must be treated as neuter and genus names ending on – are to be treated as feminine.


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  1. Collins M. D., Stackebrandt E. 1989; Molecular taxonomic studies on some LL-diaminopimelic acid-containing coryneforms from herbage: description of Nocardioides fastidiosa sp. nov. FEMS Microbiol Lett 57:289–294 [View Article][PubMed]
    [Google Scholar]
  2. Euzéby J. P. 1998; Taxonomic note: necessary correction of specific and subspecific epithets according to Rules 12c and 13b of the International Code of Nomenclature of Bacteria (1990 Revision). Int J Syst Bacteriol 48:1073–1075 [View Article][PubMed]
    [Google Scholar]
  3. MacAdoo T. O. 1993; Nomenclatural literacy. In Handbook of New Bacterial Systematics pp. 339–358 Edited by Goodfellow M., O’Donnell A. G. London: Academic Press;
    [Google Scholar]
  4. Parker C. T., Tindall B. J., Garrity G. M. 2015; International Code of Nomenclature of Prokaryotes. Int J Syst Evol Microbiol [View Article][PubMed]
    [Google Scholar]
  5. Prauser H. 1976; Nocardioides, a new genus of the order Actinomycetales . Int J Syst Bacteriol 26:58–65 [CrossRef]
    [Google Scholar]
  6. Sowers K. R., Ferry J. G. 1983; Isolation and characterization of a methylotrophic marine methanogen, Methanococcoides methylutens gen. nov., sp. nov. Appl Environ Microbiol 45:684–690[PubMed]
    [Google Scholar]
  7. Suda S., Watanabe M. M., Otsuka S., Mahakahant A., Yongmanitchai W., Nopartnaraporn N., Liu Y., Day J. G. 2002; Taxonomic revision of water-bloom-forming species of oscillatorioid cyanobacteria. Int J Syst Evol Microbiol 52:1577–1595 [View Article][PubMed]
    [Google Scholar]
  8. Trüper H. G., Euzéby J. P. 2009; International Code of Nomenclature of Prokaryotes. Appendix 9: Orthography. Int J Syst Evol Microbiol 59:2107–2113 [View Article][PubMed]
    [Google Scholar]
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