The plagiopylids are a small order of ciliate protozoa, including a few forms common in anaerobic habitats.
The body cilia are dense, and arise from monokinetids with an entirely unique ultrastructure; one or two rows of dikinetids run into the oral cavity, which takes the form of a groove, with a deep tube lined by oral cilia leading to the mouth. The order was introduced by Small & Lynn in 1985, who treated it as a subclass of Oligohymenophorea. Since then they tend to be treated as an independent class, possibly affiliated with the Colpodea.
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SAR: Chromalveolata: Alveolata |
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| Ciliophora |
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| Myzozoa |
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With a theca: Peridiniales ( Pfiesteria, Peridinium) · Gonyaulacales ( Ceratium, Gonyaulax) · Prorocentrales ( Prorocentrum) · Dinophysiales ( Dinophysis, Histioneis, Ornithocercus, Oxyphysis)
Without theca: Gymnodiniales (Gymnodinium, Akashiwo, Karenia, Karlodinium, Amphidinium) · Suessiales (Polarella, Symbiodinium)
Noctilucales ( Noctiluca) |
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Syndiniales: Amoebophryaceae ( Amoebophyra) · Duboscquellaceae ( Duboscquella) · Syndiniaceae ( Hematodinium, Syndinium)
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Other
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Oxyrrhis
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| Other |
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