@article{9218861a-681c-4d71-9905-e9f3a7ae30e9,
author = {Vasily V. Zlatogursky},
title = {Two New Species of Centrohelid Heliozoans: Acanthocystis costata sp. nov. and Choanocystis symna sp. nov.},
journal = {Acta Protozoologica},
volume = {2014},
number = {Volume 53, Issue 4},
year = {2014},
issn = {0065-1583},
pages = {313-324},keywords = {Centrohelids; Heliozoa; protists; systematics; ultrastructure; external skeleton; Acanthocystis costata sp. nov.; Choanocystis symna sp. nov.},
abstract = {Two new species of centrohelid heliozoans Acanthocystis costata and Choanocystis symna from a freshwater lake on Valamo Island and a freshwater pool in St. Petersburg (North-Western Russia) were studied with light and electron microscopy. Sequences of 18S rDNA were obtained for both species.Choanocystis symna has dumbbell-shaped plate scales (4.4–5.0 × 1.62–1.90 µm) and spine scales (3.9–6.7 µm) bearing from 3 to 5 (usually four) short teeth on the distal end. Acanthocystis costata has oval plate scales (1.3–3.7 × 0.9–1.9 µm), bearing numerous granules as well as radial slits and spine scales (2.1–9.5 µm) with 4–6 teeth on the distal end. Acanthocystis costata and Acanthocystis nichollsi are similar in having slit-bearing plate scales and group together on the 18S rDNA tree. The presence of large particles of unknown nature was observed in food vacuoles of Acanthocystis costata.},
doi = {10.4467/16890027AP.14.021.1776},
url = {https://ejournals.eu/en/journal/acta-protozoologica/article/two-new-species-of-centrohelid-heliozoans-acanthocystis-costata-sp-nov-and-choanocystis-symna-sp-nov}
}