Bacillariophyta—the diatoms

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Centric diatoms are oogamous, with flagellated sperm.Pennate diatoms are isogamous, with ameboid gametes The smallest cells become sexual and release isogamous gametes What type of sexual life cycle is this? http://www.mie.utoronto.ca/labs/lcdlab/biopic/fig/27.19.jpg
Some examples of pennate diatoms generally raphed—capable of movement on substrate (1-20 µm s) solitary and benthic (in streams or wave washed shores of lakes) or epiphytic Gyrosigma Frustules raphed, valves sigmoid, raphe sigmoid with external proximal raphe ends recurved in opposite directions form one another. central area round to elliptical. A genus of benthic species, often in lakes and reservoirs. Around 100 microns long
Page 1 and 2: Bacillariophyta—the diatoms •th
Page 3: The new valve is always a hypovalve
Page 7 and 8: Some pennate forms are colonial and
Page 9 and 10: Examples of centric diatoms Non-rap
Page 11 and 12: Achnanthes: heterovalvular, one val
Page 13 and 14: Epiphytic pennate diatoms
Page 15 and 16: Chrysophyta--Golden brown algae Cel
Page 17 and 18: 50 microns large branched colonies,
Page 19 and 20: Pyrrophyta--Dinoflagellates •Cell
Page 21 and 22: Gonyaulax—causes red tides, shell
Page 23: Pfiesteria—a toxic dinoflagellate

Bacillariophyta—the diatoms

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