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Journal Article

The thecal structure of Peridiniopsis amazonica spec. nov. (Dinophyceae), a new cyst-producing freshwater dinoflagellate from Amazonian floodplain lakes

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons56728

Meyer,  Barbara
Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons56871

Rai,  Hakumat
Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Citation

Meyer, B., Rai, H., & Cronberg, G. (1997). The thecal structure of Peridiniopsis amazonica spec. nov. (Dinophyceae), a new cyst-producing freshwater dinoflagellate from Amazonian floodplain lakes. Nova Hedwigia, 65(1-4), 365-375.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-E253-4
Abstract
A new peridinioid, cyst-producing dinoflagellate, Peridiniopsis amazonica spec. nov., is described from six Central Amazonian floodplain lakes of different lake water types (white, mixed and dystrophic black water lakes). It is the most common dinoflagellate and is dominant in acidic and circumneutral lakes lateral to Rio Negro and Rio Solimoes at low water levels, low nutrient supply and relatively high water temperatures. The large sized species is distinctive in its rhombic body shape, rigid theca, two prominent antapical spines and offset cingulum. The plate formula is: Po, X, 3', 1a, 6 '', 6c, 4s, 5''' 2''''. Peridiniopsis amazonica forms endogenous resting cysts with unornamented walls reflecting the shape of the vegetative cell. The period of high water level is spent in the cyst stage