Marine Centrohelid Heliozoans (Centroplasthelida Febvre-Chevalier et Febvre, 1984) From Bays of Sevastopol (the Black Sea Shore)

Prokina, Kristina; Zagumyonnyi, Dmitry G.; Mylnikov, Alexander P.

doi:10.1134/s1063074019050092

Cited by 9 publications

(4 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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: 99%

“…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%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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

View full text Add to dashboard Cite

show abstract

“…Centrohelids are characterized by ribbon‐shaped mitochondrial cristae, axopodia radiating from tripartite microtubules‐organizing centers (Cavalier‐Smith & Chao, 2012), and ball+cone element‐containing extrusomes (Sakaguchi et al, 2002). Centrohelid heliozoans inhabit benthos and periphyton of freshwater (Gerasimova & Plotnikov, 2016; Prokina & Mylnikov, 2019; Zlatogursky, 2013), marine (Prokina et al, 2019; Shɨshkin et al, 2018), and hypersaline ecosystems (Gerasimova et al, 2020; Plotnikov & Gerasimova, 2017), as well as soil (Cavalier‐Smith & von der Heyden, 2007; Zagumyonnyi et al, 2021). Centrohelid heliozoans along with haptophytes constitute the Haptista supergroup (Burki et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Unexpected ubiquity of heart‐shaped scale morphotype in Centroplasthelida (Haptista): Ancestral trait or multiple acquisitions?

Gerasimova,

Mindolina,

Tikhonenkov

et al. 2023

J Eukaryotic Microbiology

View full text Add to dashboard Cite

Centrohelids (Haptista: Centroplasthelida) are axopodial protists with a remarkable diversity of external siliceous scale morphologies. It is believed that the last common ancestor of centrohelids had a double layer of siliceous scales composed of plate scales closer to a cell surface and spine scales radiating outwards. The characteristic morphotype of spine scales with a heart‐shaped base was once believed to be a unique feature of the genus Choanocystis, as it was defined by Siemensma and Roijackers (1988). Further research revealed that this morphology is present in different and sometimes distantly related lineages: Ozanamiidae, Meringosphaeridae, and Marophryidae. Here, we report the fourth clade, Pterocystidae, which is also revealed to contain representatives having this phenotype. Cernunnos gen. nov. is erected here to place Cernunnos uralica sp. nov., Cernunnos arctica sp. nov., Cernunnos america sp. nov., and Cernunnos antarctica Tikhonenkov et Mylnikov, 2010, Gerasimova comb. nov. C. uralica was studied with scanning electron microscopy and SSU rDNA sequencing. Molecular phylogenetic analysis placed it into marine environmental clade P within Pterocystida. The ubiquity of spine scales with heart‐shaped bases could be an example of parallel evolution, but taking into account the considerable similarity it is likely an ancestral trait, acquired from the last common ancestor of centrohelids.

show abstract

“…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%

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

Zagumyonnyi

Radaykina²,

Tikhonenkov³

2021

Diversity

View full text Add to dashboard Cite

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.

show abstract

Marine Centrohelid Heliozoans (Centroplasthelida Febvre-Chevalier et Febvre, 1984) From Bays of Sevastopol (the Black Sea Shore)

Cited by 9 publications

References 21 publications

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

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

Unexpected ubiquity of heart‐shaped scale morphotype in Centroplasthelida (Haptista): Ancestral trait or multiple acquisitions?

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

Contact Info

Product

Resources

About