Inland Water Biology

, Volume 12, Issue 1, pp 10–20 | Cite as

Centrohelid Heliozoans from Freshwater Habitats of Different Types of South Patagonia and Tierra del Fuego, Chile

  • K. I. ProkinaEmail author
  • A. P. Mylnikov


The species composition of centrohelid heliozoans from freshwater habitats of different types (sphagnum bog, temporary and permanent water bodies and streams) of Southern Chile has been studied. Fourteen species (Acanthocystis nichollsi, A. pectinata, A. penardi, Pseudoraphidiophrys discoidea, P. formosa, P. veliformis, Raphidiophrys ovalis, Choanocystis perpusilla, Pterocystisfoliaceatruncata, P. pyriformis, P. quadrata, Raineriophrys erinaceoides, R. fortesca, and R. pteromorphos) are observed. Two species (Acanthocystis nichollsi and Pterocystis quadrata) are recorded in Chile for the first time. Most of these species are recorded in Southern Chile for the first time. Electron microscopy is used to investigate the external morphology of scales, having important diagnostic value. Morphological descriptions and micrographs of studied scales amplify the concept of intraspecies variability and supplement the diagnosis of species.


Centrohelids heliozoa protists species diversity morphology sphagnum bog freshwater South Patagonia Tierra del Fuego Chile 



We are grateful to A.A. Prokin and D.A. Filippov for help in collecting material.

This work was performed as part of state task no. AAAA-A18-118012690098-5 and supported by the Russian Foundation for Basic Research (no. 14-04-00500, 17-04-00565 and 15-29-02518 ofi_m).


The authors declare that they have no conflict of interest. This article does not contain any studies involving animals or human participants performed by any of the authors.


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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  1. 1.Papanin Institute for Biology of Inland Waters, Russian Academy of SciencesBorokRussia

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