Red Algae

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Red Algae

• Most are micro- and macroscopic seaweeds
• A few are single cells
• Rhodella, Rhodosorus, Porphoridium occur in the
  plankton.
• Never have flagellate stages
• Appear red (rarely blue) because of
  phycobilipigments.

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Rhodosorus
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Rhodella
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Green Algae

• Numerous classes of green algae
• Two major lineages to land plants, not to land
  plants
• Usually two equal anterior flagella
• Swimming is usually by breast stroke
• Most have no light-harvesting pigments other than
  chlorophylls a and b, so they appear green.

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Tetraselmis
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Pyramimonas
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Dunaliella
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Pterosperma
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Asteromonas
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Prasinococcus
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Mesostigma
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Haptophytes - Prymnesiophytes

• Golden brown color because of carotenoids
• Two /- equal flagella, no hairs
• Swim two ways
• flagella pull cell with breast stroke
• flagella push cell with weak sinusoidal beat
• Two chloroplasts
• Some produce coccoliths

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Emiliania huxleyi
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Ochrosphaera
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Chrysochromulina
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Phaeocystis
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Pavlova
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Prymnesium
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Blue-green algae - cyanobacteria

• Prokaryotic cells, no nucleus, no organelles
• Most with chlorophyll a only
• Prochlorococcus is putatively most abundant
  organism on the planet
• Synechococcus is widespread, common
• Both discovered only recently
• Some capable of nitrogen fixation

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Prochlorococcus
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Synechococcus
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Trichodesmium
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Chroococcidiopsis or Myxosarcina
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Cylindrospermatopsis
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Tolypothrix
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Arthrospira
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Anabaena
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Euglenophytes

• Chlorophyll a and b only, so look green
• Usually with 2 anterior flagella, but
  Tetreutreptia has 4 flagella
• Mostly estuarian, tide pools, near or on
  substrate (rarely in plankton)

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Tetreutreptia
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Pelagophyceae

• Common open ocean picoplankters
• Aureococcus, Aureoumbra are coastal
• Olive green color
• Various flagellar types, or no flagella

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Aureoumbra
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Pelagomonas
Aureococcus
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Dictyochophyceae

• Silicoflagellates, Pedinellids, Rhizochromulina

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Pseudopedinella
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Rhizochromulina
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Bolidophyceae

• Oceanic picoplankters related to diatoms
• Two flagella
• Golden color, with light-harvesting carotenoids
• Two known species only

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Bolidomonas
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Raphidophyceae

• Heterosigma, Chattonella are fish killers
• Mostly restricted to coastal harbors, bays
• Numerous discoid chloroplasts (golden)
• Two flagella, one anterior (with hairs), one
  posterior

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Heterosigma
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Chattonella
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Haramonas
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Chlorarachniophytes

• Related to amoebae, but have chloroplasts from
  endosymbiotic event
• Nucleomorph is present
• Chlorophylls a and b, green in color
• One famous flagellate - Bigelowiella

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Bigelowiella natans
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Gymnochloris
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Lothariella
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Chlorarachnion
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Cryptophytes

• 2 anterior flagella, bipartite flagellar hairs
• Red, green or blue phycobilipigments
• Nucleomorph
• Ejectosomes
• Periplast usually of organic plates

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Campylomonas
Chroomonas
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Proteomonas
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Rhodomonas
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Glaucophytes
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Cyanophora
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Chrysophytes
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Dinobryon balticum
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Dinobryon sociale
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Poterioochromonas
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Chrysamoeba
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Phaeoplaca
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Epipyxis
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Phaeothamniophyceae
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Phaeoschizochlamys
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Phaeothamnion
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Stichogloea
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