Centrohelid Heliozoans (Centroplasthelida Febvre-Chevalier et Febvre, 1984) from Different Types of Freshwater Bodies in the Middle Russian Forest-steppe
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RIS BIB ENDNOTECentrohelid Heliozoans (Centroplasthelida Febvre-Chevalier et Febvre, 1984) from Different Types of Freshwater Bodies in the Middle Russian Forest-steppe
Publication date: 12.02.2019
Acta Protozoologica, 2018, Volume 57, Issue 4, pp. 245 - 266
https://doi.org/10.4467/16890027AP.18.018.10094Authors
Centrohelid Heliozoans (Centroplasthelida Febvre-Chevalier et Febvre, 1984) from Different Types of Freshwater Bodies in the Middle Russian Forest-steppe
Species diversity of centrohelid heliozoans in different types of freshwater bodies (forest lakes, floodplain lakes, sphagnum bogs, and river) in the Middle Russian forest-steppe was studied. The morphology of cell coverings (scales and spicules) were observed using scanning and transmission electron microscopy. A total of 20 species of centrohelid heliozoans from five families (Acanthocystidae, Pterocystidae, Raphidiophryidae, Raphidocystidae, and Choanocystidae) and six genera (Acanthocystis, Raineriophrys, Pterocystis, Raphidiophrys, Raphidocystis, and Choanocystis) as well as unidentified Centrohelea species and a Heterophrys-like organism were found. Morphological descriptions and electron micrographs are provided. The most common species were Acanthocystis nichollsi, Raphidiophrys capitata, and a Heterophrys-like organism. The highest species diversity was observed in terrace forest lakes, whereas the lowest was seen in sphagnum bogs. Four species (Acanthocystis costata, A. elenazhivotovae, A. mikrjukovii, and A. spinosa) were found for the first time since their original description. Three species (Acanthocystis spinosa, Raphidiophrys capitata, and Pterocystis pulchra) are new records for Russia. The distribution of the observed morphospecies confirms the cosmopolitanism of many centrohelids and highlights the importance of the type of water body and microbiotope in forming the species composition. The obtained data on the morphology of studied scales supplements our knowledge of the intraspecific variability of centrohelid heliozoans.
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Information: Acta Protozoologica, 2018, Volume 57, Issue 4, pp. 245 - 266
Article type: Original article
Papanin Institute for Biology of Inland Waters RAS, Borok, Yaroslavl region, Russia
Papanin Institute for Biology of Inland Waters RAS, Borok, Yaroslavl region, Russia
Voronezh State University, 1 Universitetskaya pl., Voronezh, 394018, Russia
Laboratory of Microbiology, Institute for Biology of Inland Waters, Russian Academy of Sciences, Yaroslavl Region, Borok, Russia
Laboratory of Protozoan Taxonomy and Ecology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
Voronezh State University, 1 Universitetskaya pl., Voronezh, 394018, Russia
Published at: 12.02.2019
Article status: Open
Licence: CC BY-NC-ND
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