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Abstract
A recent publication has created the genus name Hungateiclostridium Zhang et al. 2018 and the new combinations Hungateiclostridium cellulolyticum (Patel et al. 1980) Zhang et al. 2018, Hungateiclostridium aldrichii (Yang et al. 1990.) Zhang et al. 2018, Hungateiclostridium alkalicellulosi (Zhilina et al. 2006) Zhang et al. 2018, Hungateiclostridium clariflavum (Shiratori et al. 2009) Zhang et al. 2018, Hungateiclostridium straminisolvens (Kato et al. 2004) Zhang et al. 2018 and Hungateiclostridium saccincola (Koeck et al. 2016) Zhang et al. 2018 for names at the rank of species that were previously either included in the genus Clostridium Prazmowski 1880, Acetivibrio Patel et al. 1980 or Herbivorax Koeck et al. 2016. Rules 23a, 38, 39b, 41a, 42 and 44 have not been followed and an illegitimate name at the rank of genus or illegitimate combinations at the rank of species as defined in Rule 51b(1) and (2) have been created. Another aspect is recognising the fact that an instance of heterotypic synonym has been created between Acetivibrio Patel et al. 1980, Herbivorax Koeck et al. 2016 and Hungateiclostridium Zhang et al. 2018, where the earliest validly published genus name is Acetivibrio Patel et al. 1980, of which the nomenclatural type is Acetivibrio cellulolyticus Patel et al. 1980. It follows from Rules 23a, 38, 39a, 39b, 41a, 42 and 44 that the genus name to be used is Acetivibrio Patel et al. 1980, with new combinations in that genus replacing those published in the genus Hungateiclostridium Zhang et al. 2018, which together with the genus name are illegitimate according to Rule 51b of the International Code of Nomenclature of Prokaryotes. Additional issues are also addressed with regards to the names Pseudoclostridium thermosuccinogenes (Drent et al. 1995) Zhang et al. 2018, Pseudoclostridium Zhang et al. 2018 Oscillospiraceae Peshkoff 1940 (Approved Lists 1980), Ruminococcaceae Rainey 2010, Eubacteriale s Buchanan 1917 (Approved Lists 1980) and Clostridiales Prévot 1953 (Approved Lists 1980)
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