organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Domain Eukaryota Chatton, 1925 - eukaryotes Kingdom Chromista Caval.-Sm. (1981) - chromists Phylum Oomycota Arx (1967) Family Pontismataceae H.E. Petersen ex P.M.Kirk, P.F. Cannon & J.C. David (2001), incertae sedis Genus Petersenia Sparrow (1934) Genus Pontisma H.E. Petersen (1905)