Credit: 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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Keywords: 23324a, actinoptychus, alga, algae, aquatic, bacillariophyta, centric, chromista, colored, coloured, coscinodiscales, coscinodiscophyceae, cross, diatom, diatoms, dunkirk, electron, eukaryote, false-colored, false-coloured, fossil, fossilized, frustule, heliopelta, heliopeltaceae, iron, marine, micrograph, phytoplankton, plankton, salt, saltwater, scanning, sea, seawater, sem, silica, skeleton, symmetrical, symmetry, virginia, water

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Actinoptychus heliopelta, SEM

K006/8262 Rights Managed

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Duration: 00:00:13

Frame size: 1920x1080

Frame rate: 25

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Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 539.7M

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Capture format: Digital Rostrum

Frame size: 2646x3302

Codec: JPEG

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