| Noun | 1. | protoctist genus - any genus of Protoctista kingdom Protoctista, Protoctista - in most modern classifications, replacement for the Protista; includes: Protozoa; Euglenophyta; Chlorophyta; Cryptophyta; Heterokontophyta; Rhodophyta; unicellular protists and their descendant multicellular organisms: regarded as distinct from plants and animals genus Amoeba - protozoan inhabiting moist soils or bottom vegetation in fresh or salt water Endamoeba, genus Endamoeba - the type genus of the family Endamoebidae genus Globigerina - type genus of the family Globigerinidae genus Arcella - type genus of the Arcellidae genus Difflugia - genus of protozoans related to ameba genus Paramecium - freshwater ciliate with an oval body and long deep oral groove genus Tetrahymena - protozoa having four membranous ciliary organelles genus Stentor - trumpet-shaped protozoa with a ciliated spiral feeding funnel genus Vorticella - ciliated protozoans that have a goblet-shaped body with a retractile stalk genus Laminaria, Laminaria - type genus of the family Laminariaceae: perennial brown kelps genus Fucus - type genus of the family Fucaceae: cartilaginous brown algae Ascophyllum, genus Ascophyllum - brown algae distinguished by compressed or inflated branchlets along the axis genus Sargassum - a genus of protoctist genus Euglena - type genus of the family Euglenaceae: green algae with a single flagellum genus Ulva, Ulva - type genus of the family Ulvaceae; green seaweed having a thallus two cells thick: sea lettuce genus Volvox, Volvox - type genus of the Volvocaceae; minute pale green flagellates occurring in tiny spherical colonies; minute flagella rotate the colony about an axis Chlamydomonas, genus Chlamydomonas - type genus of the Chlamydomonadaceae; solitary doubly-flagellated plant-like algae common in fresh water and damp soil; multiply freely; often a pest around filtration plants genus Zygnema, Zygnema - type genus of the family Zygnemataceae genus Spirogyra - a genus of protoctist Chlorococcum, genus Chlorococcum - type genus of Chlorococcales; unicellular green algae occurring singly or in a layer on soil or damp rock genus Chlorella - nonmotile unicellular green algae potentially important as source of high-grade protein and B-complex vitamins genus Oedogonium, Oedogonium - type genus of Oedogoniaceae; freshwater green algae having long unbranched filaments; usually free-floating when mature Chara, genus Chara - green algae common in freshwater lakes of limestone districts genus Nitella, Nitella - fragile branching stoneworts Desmidium, genus Desmidium - a genus of protoctist Chondrus, genus Chondrus - a genus of protoctist genus Rhodymenia, Rhodymenia - type genus of the family Rhodymeniaceae genus Porphyra, Porphyra - a genus of protoctist genus Noctiluca - a genus of protoctist genus Peridinium, Peridinium - type genus of the family Peridiniidae genus Costia - a genus of flagellate protoctist genus Giardia - flagellates parasitic in intestines of vertebrates Chilomastix, genus Chilomastix - flagellates parasitic in intestines of vertebrates including humans genus Hexamita, Hexamita - flagellates free-living or parasitic in intestines of birds genus Trichomonas - flagellates parasitic in alimentary or genitourinary tracts of vertebrates and invertebrates including humans genus Eimeria - type genus of the family Eimeriidae; includes serious pathogens genus Plasmodium - type genus of the family Plasmodiidae genus Haemoproteus, Haemoproteus - type genus of the family Haemoproteidae genus Leucocytozoan, genus Leucocytozoon - a genus of protoctist genus Babesia, genus Piroplasma - type genus of the family Babesiidae genus Sarcocystis, Sarcocystis - chief genus of the order Sarcosporidia genus - (biology) taxonomic group containing one or more species |