Abstract
During a recent compilation of a Great Lakes Diatom species checklist (Stoermer et al. 1999) several new nomenclatural combinations, which to our knowledge have not yet been made in the literature, came to our attention. In order to more closely align literature on Great Lakes diatoms with current taxonomic understanding and practice, we propose the following new combinations. Names listed as synonyms are those used in the checklist list (Stoermer et al. 1999). When a synonym is not given the Great Lakes Diatom species checklist used the basionym. Brummitt & Powell (1992) have been used as a guide for orthographic consistency.