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- Title
Two New Species of Centrohelid Heliozoans: Acanthocystis costata sp. nov. and Choanocystis symna sp. nov.
- Authors
ZLATOGURSKY, Vasily V.
- 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 slitsand 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 rDNAtree. The presence of large particles of unknown nature was observed in food vacuoles of Acanthocystis costata
- Subjects
VALAAM Island (Russia); ANIMAL species; HELIOZOA; LAKES; ELECTRON microscopy; RECOMBINANT DNA
- Publication
Acta Protozoologica, 2014, Vol 53, Issue 4, p313
- ISSN
0065-1583
- Publication type
Article
- DOI
10.4467/16890027AP.14.021.1776