Dinoflagellates can serve as predators or parasites of tintinnid ciliates. Known predators feed on the ciliate from outside the tintinnid lorica, while parasites either grow in the host cytoplasm or feed inside in the lorica while attached to the outside of the host cell. Here we report mixotrophic species of Scrippsiella that enter the lorica to consume the ciliate zooid of Helicostomella subulata from Denmark and multiple tintinnid species from Korea. We contrast morphology and life-history stages of these mixotrophic predators with dinokaryote parasites of tintinnids and address phylogenetic relationships based on rDNA sequences. Mixotrophic Scrippsiella species sometimes attack tintinnids that are simultaneously infected by syndinean dinoflagellates, complicating study of life histories and potentially leading to confusion about trophic status and taxonomy.
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Research Article|
January 02 2020
Mixotrophic scrippsielloid dinoflagellates prey on tintinnid ciliates
D. Wayne Coats;
D. Wayne Coats
318 Bayard Rd, Lothian, MD, USA 20711
*Corresponding author: coatsw1@gmail.com
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Yameng Lu;
Yameng Lu
Swiss Federal Institute of Aquatic Science and Technology (Eawag), Department of Aquatic Ecology, Überlandstrasse 133 8600 Dübendorf, Switzerland
Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Department of Ecosystem Research, Müggelseedamm 301, 12587 Berlin, Germany
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Aquatic Ecosystem Health & Management (2020) 23 (1): 69–78.
Citation
D. Wayne Coats, Jungmin Choi, Jae Ho Jung, Young Ok Kim, Yameng Lu, Lasse Tor Nielsen; Mixotrophic scrippsielloid dinoflagellates prey on tintinnid ciliates. Aquatic Ecosystem Health & Management 2 January 2020; 23 (1): 69–78. doi: https://doi.org/10.1080/14634988.2020.1727275
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