Stream macroalgae of Hawai`i: an identification guide - Hawaii.gov
Stream macroalgae of Hawai`i: an identification guide - Hawaii.gov
Stream macroalgae of Hawai`i: an identification guide - Hawaii.gov
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Pleurosira<br />
Classification: Bacillariophyta (Family<br />
Triceratiaceae)<br />
General habit: filamentous zig-zag-shaped chains<br />
<strong>of</strong> cells, light brown in color, <strong>of</strong>ten ent<strong>an</strong>gled with<br />
other filamentous algae, growths c<strong>an</strong> be several cm<br />
in length<br />
Species in Hawai‘i: P. laevis<br />
Isl<strong>an</strong>d distribution: Kaua‘i, O‘ahu, Maui<br />
Distinguishing features: chains <strong>of</strong> cells in a zig-zag<br />
formation (Figs A, B), cells containing numerous<br />
golden-colored chloroplasts, cells in valve view are<br />
elliptical with small ornamentations in the majority<br />
<strong>of</strong> the valve surface (Fig. D)<br />
Compare with: Hydrosera, Melosira, Terpsinöe<br />
45<br />
A. A zig-zag shaped filament <strong>of</strong> Pleurosira cells.<br />
Scale bar = 100µm. B. A closer view <strong>of</strong> the chain<br />
<strong>of</strong> cells under a compound microscope. Scale bar<br />
= 45µm. C. M<strong>an</strong>y chloroplasts within a single cell.<br />
Scale bar = 45µm. D. A Pleurosira cell in valve<br />
view. Scale bar = 15µm. E. A cell in girdle (side)<br />
view. Scale bar = 45µm.
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