Presentation of the name as "Halamphora turgida var. lacustris (Gregory) Stepanek & Kociolek var. nov" is in error. This is a new taxon, not a new combination. Reference to Gregory is to the species epithet.
Stepanek, J.G. & Kociolek, J.P. (2018). Amphora and Halamphora from coastal waters and inland waters of the United States and Japan. <em>Bibliotheca Diatomologica.</em> 66: 1-260.