Centrohelid Heliozoans (Centroplasthelida Febvre-Chevalier et Febvre 1984) from Vietnam

Prokina, Kristina; Radaykina, Liudmila V.; Mylnikov, Alexander P.

doi:10.1134/s1062359020070158

Cited by 7 publications

(6 citation statements)

References 24 publications

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“…Recently, there has been a significant increase in interest in the study of protists in Vietnam [10][11][12][13][14]. In the last decade, many new and endemic taxa of algae and heterotrophic protists have been described from freshwaters of the country, including diatoms [15][16][17][18][19][20][21], cryptomonads [22,23], heterotrophic flagellates [24,25], centrohelid heliozoans [26], and testate amoebae [27].…”

Section: Introductionmentioning

confidence: 99%

Diversity of Silica-Scaled Chrysophytes in Central Vietnam

Gusev

Martynenko

2021

Water

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This paper focuses on the flora of scale-bearing chrysophytes from eight provinces located in the central part of Vietnam. Khanh Hoa, Phu Yen, Binh Dinh, Thua Thien Hue, Quang Tri, and Quang Binh provinces are located in the coastal area of Vietnam. Lam Dong and Dak Lak provinces represent mountain territories with an elevation of 500–2000 metres above sea level. In total, 212 water bodies of different origins were studied. Samples were obtained from swamp areas, lakes, rivers, reservoirs, ponds, and small temporary water bodies. In total, 76 taxa were identified by electron microscopic observations of samples. A total of 54 taxa were found in the mountainous provinces, while 73 were found in the coastal provinces. Of these, 51 species are common for both areas. The most diverse was the genus Mallomonas with 66 species, varieties, and forms; followed by Synura with 7 taxa; Chrysosphaerella with 2; and Spiniferomonas with 1. Seven taxa of the genus Mallomonas were not identified to the lower rank. All these unidentified specimens may potentially represent new species for science. Ten taxa are reported for the first time in Vietnam.

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Section: Introductionmentioning

confidence: 99%

Diversity of Silica-Scaled Chrysophytes in Central Vietnam

Gusev

Martynenko

2021

Water

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“…R . fortesca is a ubiquitous species previously observed in fresh water in North America (Wujek, 2003b, 2005), South America (Dürrschmidt, 1985; Prokina & Mylnikov, 2019), Europe (Siemensma & Roijackers, 1988; Vørs, 1992), Africa (Wujek et al, 2011), Australia (Croome, 1986), Asia, Vietnam (Prokina et al, 2019a), European Russia (Mikrjukov, 1993b; Plotnikov & Ermolenko, 2015; Prokina et al, 2018), and in marine environments of the White Sea (24‰; Leonov, 2010), the Black Sea (16–18‰; Prokina et al, 2019b), and Vietnam (35‰; Prokina, 2020).…”

Section: Resultsmentioning

confidence: 98%

“…symmetrica was previously identified in fresh water in North America, Canada (Nicholls & Dürrschmidt, 1985), Greenland (Ikävalko et al,. 1996), the Netherlands (Siemensma, 1981), Asia, Vietnam (Prokina et al, 2019a), and European Russia (Leonov, 2010; Leonov & Mylnikov, 2012; Plotnikov & Gerasimova, 2017; Prokina & Philippov, 2019; Prokina et al, 2017a).…”

Section: Resultsmentioning

confidence: 99%

“…A . pectinata is a widespread species observed in fresh water in North America (Nicholls, 1983; Wujek, 2003a, 2006), South America and Chile (Prokina & Mylnikov, 2019), Africa (Prokina et al, 2017b), Europe (Mikrjukov, 1993a; Siemensma & Roijackers, 1988), India (Wujek & Saha, 2006), Australia (Croome, 1986), Asia, Vietnam (Prokina et al, 2019a), and European Russia (Leonov, 2010; Leonov & Mylnikov, 2012; Leonov & Plotnikov, 2009; Mikrjukov, 1993b; Plotnikov & Ermolenko, 2015; Prokina et al, 2017a, 2018); it was found in brackish (2‰) inland waters of European Russia (Plotnikov & Gerasimova, 2017).…”

Section: Resultsmentioning

confidence: 99%

“…A . turfacea is a widespread species, which occurs in fresh water in North America (Nicholls, 1983; Wujek, 2005, 2006, 2015), South America and Chile (Dürrschmidt, 1985), Europe (Siemensma, 1981; Zlatogursky, 2014a, Zlatogursky, 2014b), Africa (Wujek et al, 2007), India (Wujek & Saha, 2006), Australia (Croome, 1986), and European Russia (Ermolenko & Plotnikov, 2013; Leonov & Mylnikov, 2012; Leonov & Plotnikov, 2009; Mikrjukov, 1993b, 1999; Plotnikov and Ermolenko 201; Prokina & Philippov, 2019; Prokina et al, 2018); it has been found in marine environments (~35‰) of Antarctica (Croome et al, 1987), Asia, and Vietnam (Prokina et al, 2019a). In European Russia, it has been found in the Baltic Sea (5–6‰; Vørs, 1992), the Black Sea (16–18‰; Prokina et al, 2019b), the White Sea (24‰; Leonov, 2010; Leonov & Mylnikov, 2012), and in saline (30–42.2‰) inland waters of European Russia (Plotnikov & Gerasimova, 2017).…”

Section: Resultsmentioning

confidence: 99%

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Silica‐scaled heterotrophic protists Rotosphaerida, Thaumatomonadida, and Centroplasthelida in the large continuous ecosystem connecting Lake Baikal to the Kara Sea

Bessudova

Firsova

Likhoshway

2021

J Eukaryotic Microbiology

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Heterotrophic protists Rotosphaerida, Thaumatomonadida, and centrohelid heliozoans are among the less studied silicified protists in terms of their biogeography and ecology. These organisms inhabit fresh and brackish water, and leave behind siliceous structural elements after death that are species‐specific and amenable to electron microscopic analysis. This paper is the first to present data on species richness and taxonomic structure of silica‐scaled heterotrophic protists—rotosphaerids, colorless free‐living thaumatomonad flagellates and centrohelid heliozoans—in the large continuous water system of Siberia connecting Lake Baikal to the Kara Sea. In the study area, electron microscopy revealed 21 centrohelid heliozoan species from the genera Raphidiophrys (1), Acanthocystis (7), Choanocystis (3), Raineriophrys (2), Raphidocystis (6), and Pterocystis (2), seven rotosphaerid species from the genera Pinaciophora (3), Turriplaca (2), Rabdiophrys (1), and Pompholyxophrys (1), and one thaumatomonad flagellate species Thaumatomastix. Two species of rotosphaerids, Rabdiophrys cf. anulifera and Pinaciophora tridentata, and two species of centrohelid heliozoans, Acanthocystis cf. tubata, and A. cf. cornuta, were found in the waters of Russia for the first time. The most widespread species in fresh water from Lake Baikal to the Lower Yenissei River were Pinaciophora fluviatilis and Raineriophrys cf. fortesca. These species disappeared from the protist assemblages of the Yenissei gulf of the Kara Sea due to higher salinity, with only three species, Acanthocystis cf. mylnikovi (at 3.12‰ salinity) and A. pectinata and Raphidocystis sp. 2 (at 8‰ salinity), found in the area. The sensitivity of silica‐scaled heterotrophic protists to changes in habitat parameters suggests that these microeukaryotes could be new indicator organisms.

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