Credit: GERD GUENTHER/SCIENCE PHOTO LIBRARY

Caption: Thuricola and Vorticella ciliates. Light microscope differential interference contrast (DIC) footage of the peritrich ciliates Thuricola folliculata (green, elongated) and Vorticella (bell-shaped). These sessile microscopic organisms are found in water, attached to other plants and animals by a stalk. Thuricola folliculata houses symbiotic green algae (genus Chlorella), and has a shell-like protective chitinous outer covering (a lorica), with a flap valve. On disturbance, the ciliate retracts into its housing. The Vorticella ciliates similarly contract their stalks for protection. These retractions are seen several times here. Magnification: x71 at 10 centimetres across.

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Keywords: alga, algae, aquatic, biological, biology, chlorella, ciliate, ciliates, dic, differential interference contrast, light micrograph, light microscope, light microscopy, lorica, peritrich, protist, protozoa, protozoan, reflex, retracting, retraction, sessile, single-celled, symbiotic chlorella, thuricola folliculata, unicellular, vorticella, water, zoological, zoology

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Thuricola and Vorticella ciliates

K004/1867 Rights Managed

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Duration: 00:00:45.11

Frame size: 1920x1080

Frame rate: 24

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Capture format: EOS 5D MK2

Codec: Uncompressed 8-bit 4:2:2

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