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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Microcoleus<br />
Classification: Cy<strong>an</strong>obacteria (Family<br />
Phormidiaceae)<br />
General habit: forms dark blue-green patches or<br />
mats on submerged surfaces, composed <strong>of</strong> filaments<br />
in confluent sheaths, usually a purplish-gray mass<br />
Species in Hawai‘i: M. lacustris, M. vaginatus<br />
Isl<strong>an</strong>d distribution: O‘ahu, Hawai‘i<br />
Distinguishing features: parallel filaments<br />
enclosed in a mucilaginous sheath, slight tapering<br />
toward the end <strong>of</strong> the filament (Fig. B), cross walls<br />
sometimes have a gr<strong>an</strong>ular appear<strong>an</strong>ce (Fig. B)<br />
Compare with: Phormidium, Schizothrix<br />
15<br />
A. A piece <strong>of</strong> <strong>an</strong> epilithic mat formed by<br />
Microcoleus. Scale bar = 2mm. B. A compound<br />
microscope view <strong>of</strong> a Microcoleus filament, illustrating<br />
gr<strong>an</strong>ular cross walls (some species). Scale<br />
bar = 10µm. C, D. Parallel trichomes enclosed in a<br />
sheath. Scale bar = 15µm.
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