DNA sequencing, anatomy, and calcification patterns support a monophyletic, subarctic, carbonate reef-forming Clathromorphum (Hapalidiaceae, Corallinales, Rhodophyta).
Adey WH, Hernandez-Kantun JJ, Johnson G, Gabrielson PW. J Phycol. 2015 Feb; 51(1):189-203. Epub 2015 Jan 20.