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Diatom, Stephanodiscus Under the Microscope

Diatom, Stephanodiscus

These diatoms are from a water sample collected from the Metolius River in Oregon.

Transmitted Darkfield Illumination


Significance in the Environment:

Characteristic Features:

Stephanodiscus has a circular valve view with uniserial punctae near the center and radial multiserial punctae out from the central area. There is a circle of spines protruding near the perifory from the smooth areas between the rows of punctae.

Associated Particles:


Prescott, G. W., HOW TO KNOW THE FRESHWATER ALGAE, Wm. C. Brown Company, 1970

Vinyard, William C., DIATOMS OF NORTH AMERICA, Mad River Press, Inc., 1979, (ISBN 0-916-422-15-1)

Round, F.E., R. M. Crawford, D.G. Mann, THE DIATOMS:BIOLOGY & MORPHOLOGY OF THE GENERA, Cambridge University Press, pp. 148-9, 1990. (ISBN 978-0-521-71469-3)

Stoermer, Eugene F. and John P. Smol (eds), THE DIATOMS:APPLICATIONS FOR THE ENVIRONMENTAL AND EARTH SCIENCES, Cambridge University Press, 2001 (ISBN 0521004128)