A second addendum to Schneider and Wynne’s (Schneider, C.W. and M.J. Wynne. 2007. A synoptic review of the classification of red algal genera a half a century after Kylin’s “Die Gattungen der Rhodophyceen”. Bot. Mar. 50: 197–249.) “Synoptic review” of red algal genera and their classification is presented, with an updating of names of new taxa at the generic level and higher. In the past few years, the hierarchy of some genera has changed due to new subfamilies, which are cited and referenced below. There have also been the descriptions of some higher taxa in the past few years.