"chrysophytes" see [unranked] core chrysophytes Class Phaeothamniophyceae R.A. Andersen & J.C. Bailey (1998) Order Phaeothamniales Bourr. (1954) Family Phaeothamniaceae Hansgirg (1886) Genus Sphaeridiothrix A.A. Pascher & W. Vlk, 1941-1942[1943]