DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Scanning electron micrograph (SEM) of a diatom (Cyclotella sp.) Cyclotella is a marine centric diatom from the family Coscinodiscaceae. Its frustule is drum-shaped. It can be a planktonic free-floating single cell or form filaments attached by mucilaginous strings. Magnification: x2,500 when shortest axis printed at 25 millimetres.
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