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Actinoptychus heliopelta, SEM

K006/8262

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Credit

DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY

Caption

Animated coloured scanning electron micrograph (SEM) of centric fossil diatom frustule (Actinoptychus heliopelta). Known as the Iron cross, this marine centric diatom came from deposits found at Dunkirk, Virginia. Diatoms have delicately sculpted transparent silica shells (frustules) that overlap like the halves of a pillbox, allowing light to penetrate the cell for photosynthesis.

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  • Duration: 00:00:13
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