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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Synedra<br />
Classification: Bacillariophyta (Family<br />
Fragilariaceae)<br />
General habit: radiating needle-like colonies, seen<br />
as small, light brown colored “balls”, usually<br />
epiphytic on mosses or algae<br />
Species in Hawai‘i: S. ulna<br />
Isl<strong>an</strong>d distribution: Kaua‘i, O‘ahu, Maui, Hawai‘i<br />
Distinguishing features: cells formed into needlelike<br />
clusters, cells a golden color due to the<br />
presence <strong>of</strong> multiple chloroplasts, cells c<strong>an</strong><br />
sometimes be stacked into vertical colonies (Fig. B)<br />
Compare with: periphyton growth<br />
46<br />
A. A mat <strong>of</strong> needle-like clusters <strong>of</strong> Synedra cells<br />
seen under a dissecting microscope. Scale bar =<br />
500µm. B. A series <strong>of</strong> cells attached together.<br />
Scale bar = 25µm. C. A girdle (side) view <strong>of</strong> a cell<br />
showing the chloroplasts. Scale bar = 50µm. D. A<br />
mount <strong>of</strong> diatoms showing a large Synedra cell in<br />
the center. Scale bar = 50µm.
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