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Synapomorphy
Shared derived characteristic.
Alveoli & Plastids
The two synapomorphies shared by members of the SAR clade.
Stramenopila, Alveolata, Rhizaria
The three protist supergroups in the SAR clade.
Ecological role, Habitat, Motility
Three ways we artificially group protists.
Excavata
Supergroup defined by having a feeding groove.
Strawmenopila
Supergroup defined by having straw-like hairs on the flagella.
Rhizaria
Supergroup defined by having hair-like pseudopodia.
Alveolata
Supergroup defined by having alveoli.
Amoebozoa
Supergroup of free-living heterotrophs who feed via pseudopods.
Opisthokonta
Supergroup defined by having a single posterior flagellum.
Archaeplastida - Plant-Related Algae
The supergroup that includes green & red algae.
Phaeophyceae
The subgroup of Strawmenopila that includes brown algae.
Bacillariophyceae
The subgroup of Strawmenopila that includes diatoms.
Oomycota
The fungus-like subgroup of Strawmenopila that possesses filamentous hyphae.
Metamonads
The subgroup of Excavata that includes parasites like Giardia.
Euglenoids
The subgroup of Excavata that has a light-sensitive eyespot. have flagellum chlorophyll. Apex predators
Kinetoplastida
The subgroup of Excavata that has special mitochondrial DNA in the form of a kinetoplast.
Ciliaphora
The subgroup of Alveolata that is defined by the presence of cilia, a cytosome, and a cytoproct.
Apicomplexa
The subgroup of Alveolata made up of multi-host animal parasites that have a special apical complex around an apical pore.
Dinozoa
The subgroup of Alveolata made up of marine plankton that possess a two-valved shell, 2 flagella, and chloroplasts with 4 membranes.
Radiolaria
The subgroup of Rhizaria that possesses a star-shaped silicate test (shell).
Foraminifera
The subgroup of Rhizaria that possesses a calcium carbonate test (shell).
Nuclearia
The subgroup of Opisthokonta that possesses filose pseudopodia.
Choanoflagellates
The subgroup of Opisthokonta that has a food-trapping collar and is believed to be closely related to metazoans (animals).
Rhodophyta
The subgroup of plant-related algae that includes red algae, lacks a flagella and is used in edible products.
Chlorophyta
The subgroup of plant-related algae that includes green algae and has both chlorophyl a and b.
Kinetoplast
A mass of DNA carried within a single, oversized mitochondrion associated with a subgroup of Excavata.
Phagocytosis
A type of feeding in which a food particle is surrounded by a vesicle of plasma membrane that pinches off within the cytoplasm. The food particle is then digested by enzymes intracellularly.
Alveoli
A series of saclike vesicles forming a nearly continuous layer beneath the cell membrane.
Plastid
A special type of organelle that can be photosynthetic or non-photosynthetic, believed to have been acquired through secondary or tertiary endosymbiosis.
Cilia
The many hair-like projections on the outside of cells that aid in movement.
Flagella
A long, whip-like filament that helps in cell motility.
Cytoproct
The specialized part of some cells that expels waste similar to an anus, typically associated with a subgroup of Alveolata.
Cytosome
A mouth-like organelle used to take in large food particles, typically associated with a subgroup of Alveolata.
Pseudopodia
A cellular protrusion of cytoplasm that some protists use to aid in moving and/or feeding. May be lobed, hair-like, or filose.
Secondary/Tertiary endosymbiosis
When a living cell engulfs another eukaryote cell that has already undergone primary endosymbiosis.
Algae/Plant-Like, Animal-Like (Protozoa), or Fungus-Like
Three types of ecological roles we can group protists into.
Plankton or Aquatic Substrate
Two types of habitats we can group protists by.
Flagellates, Ciliates, or Amoebae
Three types of motility we can group protists by.
Amoebae
The motility type group that is described as a crawling movement via pseudopodia.
Flagellates
The motility type group that involves using a whip-like appendage for movement.
Ciliates
The motility type group that involves using short, microscopic, hair-like structures for movement. This group is sometimes believed to be monophyletic.
Algae/Plant-Like Protists
The ecological role that involves photoautotrophic protists that produce O2 as a byproduct
Animal-Like Protists (Protozoans)
The ecological role that involves heterotrophic protists that feed by ingesting food items.
Fungus-Like Protists
The ecological role that involves heterotrophic protists that absorb nutrients from the environment, including water molds and slime molds.
Plankton
The habitat grouping that includes mostly unicellular protists that can be found in salt or freshwater. This can also include viruses, bacteria, small animals. These organisms are free-floating in their environment.
Aquatic Substrate
The habitat grouping that includes large photosynthetic protists (macroalgae), multicellular protists with differentiated cell types, and some very large single-cell protists. These organisms are found attached to surfaces in their environment.
Protist
1st Eukaryotes, Single celled Organisms