Andersen, R.A. & Saunders, G.W. 1993. In R.A. Andersen, G.W. Saunders, M.P. Paskind & J.P. Sexton, Ultrastructure and 18S rRNA gene sequence for Pelagomonas calceolata gen. et sp. nov. and the description of a new algal class, the Pelagophyceae classis nov. J. Phycol. 29.