is a specific kind of: genus.

is a broader term that covers: genus Amoeba | Endamoeba, genus Endamoeba | genus Globigerina | genus Arcella | genus Difflugia | genus Paramecium | genus Tetrahymena | genus Stentor | genus Vorticella | genus Conferva, genus Tribonema, Tribonema | genus Laminaria, Laminaria | genus Fucus | Ascophyllum, genus Ascophyllum | genus Sargassum | genus Euglena | genus Ulva, Ulva | genus Volvox, Volvox | Chlamydomonas, genus Chlamydomonas | genus Zygnema, Zygnema | genus Spirogyra | Chlorococcum, genus Chlorococcum | genus Chlorella | genus Oedogonium, Oedogonium | Chara, genus Chara | genus Nitella, Nitella | Desmidium, genus Desmidium | Chondrus, genus Chondrus | genus Rhodymenia, Rhodymenia | genus Porphyra, Porphyra | genus Noctiluca | genus Peridinium, Peridinium | genus Costia | genus Giardia | Chilomastix, genus Chilomastix | genus Hexamita, Hexamita | genus Trichomonas | genus Eimeria | genus Plasmodium | genus Haemoproteus, Haemoproteus | genus Leucocytozoan, genus Leucocytozoon | genus Babesia, genus Piroplasma | genus Sarcocystis, Sarcocystis ... show more.

is a member of: kingdom Protoctista, Protoctista.