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These tintinnid ciliates made unfortunate dietary choices having ingested a parasite. Likely among the first photos published of a parasitic dinoflagellate. Images are from Jean Cachon's 1964 monograph.
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Xystonella clavata from Station 76 (South Atlantic) of the Tara Oceans Expedition
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This odd specimen was found in a sample containing X. lohmanni- it is likely some sort of variant or lorica developmental stage. Also known as a species Coxiella!
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Lugol's-fixed specimen from the Bay of Villefranche in June 2010
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Live specimen of Xystonella lohmanni from the Bay of Villefranche on July 22 2013. Z-stack of images made using a 10x objective and DIC optics.
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Found in a sample with a lot of 'normal' Xystonella lohmanni- this specimen is likely either a va developmental stage or an aberrant form of X. lohmanni.
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These specimens were all found in samples taken on June 29 2010 in the Bay of Villefranche
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Specimen from the California Current Ecosystem
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Xystonella treforti from a sample collected in the Costa Dome area by M.R. Landry. Imaged using a 10x objective- Z stack.