{Reference Type}: Journal Article {Title}: Marinobacter nauticus (Baumann et al. 1972) comb. nov. arising from instances of synonymy and the incorrect interpretation of the International Code of Nomenclature of Prokaryotes. {Author}: Tindall BJ; {Journal}: Arch Microbiol {Volume}: 202 {Issue}: 3 {Year}: Apr 2020 {Factor}: 2.667 {DOI}: 10.1007/s00203-019-01761-6 {Abstract}: Studies on Pseudomonas nautica Baumann et al. 1972 (Approved Lists 1980) and Marinobacter hydrocarbonoclasticus Gauthier et al. 1992 have shown that they should be treated as heterotypic synonyms. As a consequence, they have been treated as belonging to a single species, Marinobacter hydrocarbonoclasticus Gauthier et al. 1992. This interpretation of the International Code of Nomenclature of Bacteria/Prokaryotes is, however, based on a fundamental flaw in the interpretation of the wording of Rule 15 as documented in the 1975 and 1990 revisions where the wording has been partially corrected in the 2008 revision. A key aspect of the incorrect interpretation is that the nomenclatural type of a taxon, in this case Marinobacter hydrocarbonoclasticus Gauthier et al. 1992 (the nomenclatural type of the Marinobacter Gauthier et al. 1992) must be used instead of recognising the priority of the epithet in Pseudomonas nautica Baumann et al. 1972 (Approved Lists 1980), with the creation of a new combination Marinobacter nauticus (Baumann et al. 1972). It is now clear that there is no justification for that interpretation and it is necessary to create a new combination, Marinobacter nauticus (Baumann et al. 1972) in the situation where Marinobacter hydrocarbonoclasticus Gauthier et al. 1992 and Pseudomonas nautica Baumann et al. 1972 (Approved Lists 1980) are treated as heterotypic synonyms. Additional studies have shown that Marinobacter aquaeolei Nguyen et al. 1993 and Marinobacter hydrocarbonoclasticus Gauthier et al. 1992 should also be treated as heterotypic synonyms.