First findings of сentrohelid heliozoans (Haptista: Centroplasthelida) from marine and freshwater environments of South Korea

Zagumyonnyi, Dmitry G.; Prokina, Kristina; Tikhonenkov, Denis V.

doi:10.21685/1680-0826-2020-14-4-4

Cited by 7 publications

(5 citation statements)

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“…‘ Raphidocystis sp.’ of Zagumyonnyi et al . [20] has scales of a similar elongation and similar border width as well as a short axial rib. At the same time, there are obvious differences in fenestration.…”

Section: Discussionmentioning

confidence: 99%

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Clypifer cribrifer gen. nov., sp. nov. (Clypiferidae fam. nov., Pterocystida, Centroplasthelida), with notes on evolution of centrohelid siliceous coverings

Shɨshkin

Drachko

Zlatogursky

2021

International Journal of Systematic and Evolutionary Microbiology

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A new family, genus and species of centrohelid heliozoans, Clypifer cribrifer gen. nov., sp. nov. (Clypiferidae fam. nov.), from the Gulf of Aqaba (Israel) was studied with light and electron microscopy and SSU rRNA gene sequencing. Clypifer cribrifer has only one type of scales, partially running up the sides of the axopodia. Plate scales [0.8–2.3 (av. 1.5)×0.6–1.8 (av. 1.2) μm] are flat, elliptical or circular, fenestrated with holes of irregular shape and have a marginal rim and a very short axial rib. The cell diameter is 3.9–9.6 (av. 6.0) μm. Molecular phylogenetic analysis robustly places C. cribrifer in the C4 clade for which the new family Clypiferidae is proposed here. This position is confirmed with the short sequences in the panacanthocystid increased regions. The morphology of the new genus has similarities to the genus Raphidocystis. The probability that another Clypifer species was described under a different name in the centrohelid literature is discussed. Clypiferidae represent the second lineage of Pterocystida, which are characterized by the presence of only tangentially oriented plate scales of one type. Possible ways of evolution of the centrohelid siliceous coverings are also discussed.

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Section: Discussionmentioning

confidence: 99%

“…‘ Raphidocystis sp.’ described from the Sea of Japan (East Sea) by Zagumyonnyi et al . (p. 231 in [20]) has scales more similar to those of Clypifer than to those of Raphidocystis ( of [20]). ‘ Raphidocystis sp.’ of Zagumyonnyi et al .…”

Section: Discussionmentioning

confidence: 99%

Clypifer cribrifer gen. nov., sp. nov. (Clypiferidae fam. nov., Pterocystida, Centroplasthelida), with notes on evolution of centrohelid siliceous coverings

Shɨshkin

Drachko

Zlatogursky

2021

International Journal of Systematic and Evolutionary Microbiology

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“…Raineriophrys erinaceoides (type species of the genus Raineriophrys) belongs to the clade Pterocystida C together with Pterocystis canadensis (AY749633). The problems associated with SSU rRNA sequences belonging to Pterocystida C clade were discussed previously [27], one of which is that the two similar sequences (98.86%), P. canadensis (AY749633) and R. erinaceoides (AY268043) are assigned to different genera. Considering the morphology of the skeletal elements of T. lacunata and R. scaposa is similar to some extent, we assume that they are representatives of the same genus.…”

Section: Discussionmentioning

confidence: 99%

“…Based on 18S rRNA gene sequencing of cultured strains and environmental sequences, it was suggested that the 130 morphospecies represent only 10% of the centrohelid diversity to date [12]. This assumption seems reasonable, since a lot of new species, genera and families of centrohelids were described over the past years [9,12,[16][17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

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Triangulopteris lacunata gen. et sp. nov. (Centroplasthelida), a New Centrohelid Heliozoan from Soil

Zagumyonnyi

Radaykina²,

Tikhonenkov³

2021

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A new genus and species of centrohelid heliozoans, Triangulopteris lacunata gen. et sp. nov. (Pterocystidae Cavalier-Smith and Heyden, 2007), from four geographically remote locations (the Crimean Peninsula, the Dnieper Lowland (the East European Plain), Franz Josef Land, and the Kolyma Lowland (North–Eastern Siberia) was examined using light and electron microscopy. The novel centrohelid is characterized by round shape, 4.3–16.3 μm in diameter, covered with two types of scales: 1.06–4.54 μm long triangular spine scales and 1.22–2.05 μm oval plate scales. Studied centrohelid heliozoan possesses a unique spine scale morphology. The base of scales is represented by a horse hoof-shaped basal plate. The inner surface and lateral wings of spine scales have numerous radial ribs with two ‘pockets’ that are located on both sides of the spine shaft. These pockets are formed by the lateral wings and ends of the basal plate. The cyst formation and transition to a spicules-bearing stage were noted. Additionally, phylogenetic tree was constructed based on SSU rRNA sequences including the strain HF-25 from the permafrost of Kolyma Lowland. The resulting phylogeny recovered it within the clade Pterista, while forming a separate sister lineage to H2 clade, which only had included freshwater environmental sequences.

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Silica-scaled protists (Chrysophyceae, Centroplasthelida, Thaumatomonadida and Rotosphaerida) in waters bodies of Kotelny Island, Russian Arctic

et al. 2023

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First findings of сentrohelid heliozoans (Haptista: Centroplasthelida) from marine and freshwater environments of South Korea

Cited by 7 publications

References 0 publications

Clypifer cribrifer gen. nov., sp. nov. (Clypiferidae fam. nov., Pterocystida, Centroplasthelida), with notes on evolution of centrohelid siliceous coverings

Clypifer cribrifer gen. nov., sp. nov. (Clypiferidae fam. nov., Pterocystida, Centroplasthelida), with notes on evolution of centrohelid siliceous coverings

Triangulopteris lacunata gen. et sp. nov. (Centroplasthelida), a New Centrohelid Heliozoan from Soil

Silica-scaled protists (Chrysophyceae, Centroplasthelida, Thaumatomonadida and Rotosphaerida) in waters bodies of Kotelny Island, Russian Arctic

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