In 2001, Neimark et al. proposed the transfer of Eperythrozoon suis to the genus Mycoplasma with the Candidatus status: "CandidatusMycoplasma haemosuis" Neimark et al. 2001. The Candidatus designation is for new, incompletely described taxa, in order to give them a provisional status; changing validly published names to Candidatus would lose their standing in nomenclature. So, Neimark et al. revise "CandidatusMycoplasma haemosuis" to Mycoplasma haemosuis nom. nov. (sic).
In violation of Rules 34a, 41a and 51b (2), the specific epithet suis is changed to haemosuis in the absence of the same epithet used for a different species in the genus Mycoplasma Nowak 1929. Consequently, Mycoplasma haemosuis (Splitter 1950) Neimark et al. 2002 is not in accordance with the rules of the ICNP and the correct name should be Mycoplasma suis (Splitter 1950) Neimark et al. 2002, comb. nov.