Micrasterias pinnatifida f. tridentata (Willi Krieger) H.Croasdale, 1977 Dataset Rank FORM Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Micrasterias species Micrasterias pinnatifida Name Homonyms Micrasterias pinnatifida var. tridentata Willi Krieg., 1939 Micrasterias pinnatifida f. tridentata (Willi Krieger) H.Croasdale, 1977