Pyrrhophyta: Dinophyceae Dinoflagellates

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Presentation transcript:

Pyrrhophyta: Dinophyceae Dinoflagellates

General Structure

General Characteristics Most are solitary Most have two flagella of unequal lentgth Cellulose cell wall of thecal plates; or naked Ceratium exhibits cyclomorphosis blooms color water brown, have fish/septic odor Food reserves are iodine negative starch

Peridinium

Ceratium

Red Tide

Red Tide In marine ecosystems, can cause paralytic shellfish poisoning (PSP) Gonyaulax tamarensis

Pfiesteria Noctiluca, sea sparkle Pfisteria is heterotrophic an ambush predator. secretes a toxin that paralyzes the respiratory system of susceptible fish (e.g., Menhaden) feeds on sloughed cells from dead fish

Reproduction Asexual by binary fission Sexual 

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