Abstract
Mallomonas voloshkoae sp. nov. was described from Russia based on silica-scale morphology studied by means of transmission and scanning electron microscopy. This species belongs to the section Striatae and is characterised by scales with wide anterior flanges, forming wing-like extensions. This species is most similar in scale ultrastructure to M. pechlaneri. Mallomonas voloshkoae was reported in four mountain lakes of the Transbaikal area and was found in acidic to slightly acidic conditions with very low values of specific conductance. Mallomonas pechlaneri was reported in Russia for the first time. This is the first record of this species after the description of this taxon in Europe. Mallomonas pechlaneri was found in three oligotrophic habitats in the Altay and Sayan Mountain areas.
References
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<p>Boenigk, J., Wodniok, S., Bock, C., Beisser, D., Hempel, C. & Grossmann, L. (2018) Geographic distance and mountain ranges structure freshwater protist communities on a European scalе. <em>Metabarcoding Metagenomics</em> 2: e21519. http://dx.doi.org/10.3897/mbmg.2.21519</p>
<p>Gusev, E.S. & Kulikovskiy, M.S. (2013) A new species of the genus <em>Mallomonas</em> (Chrysophyceae: Synurales), <em>Mallomonas kuzminii</em> <em>sp. nov.</em>, from lake Frolikha (Russia, Baikal region). <em>Phytotaxa</em> 155: 66–70. https://doi.org/10.11646/phytotaxa.155.1.6</p>
<p>Gusev, E., Čertnerová, D., Škaloudová, M. & Škaloud, P. (2018) Exploring cryptic diversity and distribution patterns in the <em>Mallomonas kalinae/rasilis</em> species complex with a description of a new taxon <em>Mallomonas furtiva</em> <em>sp. nov.</em> <em>Journal of Eukaryotic Microbiology</em> 65: 38–47. https://doi.org/10.1111/jeu.12427</p>
<p>Gusev, E.S., Guseva, E.E. & Gabyshev, V.A. (2018) Taxonomic composition of silica-scaled chrysophytes in rivers and lakes of Yakutia and Magadanskaya oblast (Russia). <em>Nova Hedwigia Beiheft</em> 147: 105–117.</p>
<p>Harris, K. & Bradley, D.E. (1960) A taxonomic study of <em>Mallomonas</em>. <em>Journal of General Microbiology</em> 22: 750–777. https://doi.org/10.1099/00221287-22-3-750</p>
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<p>Jo, B.Y., Shin, W., Kim, H.S., Siver, P.A. & Andersen, R.A. (2013) Phylogeny of the genus <em>Mallomonas </em>(Synurophyceae) and descriptions if five new species on the basis of morphological evidence. <em>Phycologia</em> 52: 266–278. https://doi.org/10.2216/12-107.1</p>
<p>Kim, H.S., Kim, J.H., Shin, W. & Jo, B.Y. (2014) <em>Mallomonas elevata</em> <em>sp. nov.</em> (Synurophyceae), a new scaled Chrysophyte from Jeju Island, South Korea. <em>Nova Hedwigia</em> 98: 89–102. https://doi.org/10.1127/0029-5035/2013/0138</p>
<p>Kozhov, M.M. (1950) <em>Fresh waters of East Siberia</em>. Irkutskoe oblastnoye izdatelstvo. Irkutsk. 367 pp.</p>
<p>Kristiansen, J., Düwel, L. & Wegeberg, S. (1997) Silica-scaled chrysophytes from the Taymyr Peninsula, Northern Siberia. <em>Nova Hedwigia</em> 65: 337–351. https://doi.org/10.1127/nova.hedwigia/65/1997/337</p>
<p>Kristiansen, J. & Preisig, H.R. (2007) Chrysophyta and Haptophyta Algae, 2nd part. Synurophyceae. <em>In</em>: Büdel, B., Gärtner, G., Krienitz, L., Preisig, H.R. & Schagerl, M. (Eds.) <em>Süsswasserflora von Mitteleuropa (Freshwater flora of Central Europe)</em> 1/2. Springer-Verlag, Berlin, 252 pp.</p>
<p>Kuzmin, G.V. & Kuzmina, V.A. (1986) Species of the genus <em>Mallomonas</em> (Chrysophyta) from waterbodies of the Magadanskaya oblast. <em>Russian Botanical Journal</em> 71: 805–807.</p>
<p>Kuzmin, G.V. & Kuzmina, V.A. (1987) Silica-scaled chrysophytes from Magadanskaya oblast. <em>News of the taxonomy of lower plants</em> 24: 40–42.</p>
<p>Němcová, Y., Kreidlova, J., Pusztai, M. & Neustupa, J. (2013) <em>Mallomonas pumilio</em> group (Chrysophyceae/Stramenopiles) – a revision based on the scale/scalecase morphology and geometric morphometric data. <em>Nova Hedwigia Beiheft</em> 142: 27–49.</p>
<p>Němcová, Y., Pichrtova, M. & Zeisek, V. (2015) <em>Mallomonas alpestrina</em> <em>sp. nov.</em> (Synurales, Chrysophyceae, Stramenopiles) and its spineless relatives - <em>Mallomonas alata</em> group. <em>Phytotaxa</em> 222: 111–120. http://dx.doi.org/10.11646/phytotaxa.222.2.3</p>
<p>Němcová, Y. & Rott, E. (2018) Diversity of silica-scaled chrysophytes in high-altitude Alpine sites (North Tyrol, Austria) including a description of <em>Mallomonas pechlaneri</em> <em>sp. nov.</em> <em>Cryptogamie Algologie</em> 39 (1): 35–62. https://doi.org/10.7872/crya/v39.iss1.2018.63</p>
<p>Neustupa, J. & Němcová, Y. (2007) A geometric morphometric study of the variation in scales of <em>Mallomonas striata</em> (Synurophyceae, Heterokontophyta). <em>Phycologia</em> 46: 123–130. http://dx.doi.org/10.2216/05-61.1</p>
<p>Perty, J.A.M. (1852) <em>Zur Kenntniss kleinster Lebensformen nach Bau, Funktionen, Systematik, mit Specialverzeichniss der in der Schweiz beobachteten</em>. Jent & Reinert, Bern, 228 pp.</p>
<p>Siver, P.A. (1991) The biology of <em>Mallomonas</em>: morphology, taxonomy and ecology. <em>Developments in Hydrobiology</em> 63: 1–230. https://doi.org/10.1007/978-94-011-3376-0_1</p>
<p>Siver, P.A. (2018) <em>Mallomonas skogstadii</em> <em>sp. nov.</em> and <em>M. bakeri</em> <em>sp. nov.</em> two new fossil species from the middle Eocene representing extinct members of the section Heterospinae? <em>Cryptogamie Algologie</em> 39 (4): 511–524. http://dx.doi.org/10.7872/crya/v39.iss4.2018.511</p>
<p>Silver, P.A. & Wolfe, A.P. (2010) A whole-cell reconstruction of <em>Mallomonas porifera </em>Siver and Wolfe from the Eocene: Implications for the evolution of chrysophyte cell architecture. <em>Nova Hedwigia Beiheft</em> 136: 117–127. https://doi.org/10.1127/1438-9134/2010/0136-0117</p>
<p>Siver, P.A. & Wolfe, A.P. (2016) <em>Mallomonas elephanthus</em> <em>sp. nov.</em> (Synurophyceae), an extinct fossil lineage bearing unique scales from the Eocene. <em>Nova Hedwigia </em>103: 211–223. https://doi.org/10.1127/nova_hedwigia/2016/0346</p>
<p>Siver, P.A., Jo, B.Y., Kim, J.I., Shin, W., Lott, A.M. & Wolfe, A.P. (2015) Assessing the evolutionary history of the class Synurophyceae (Heterokonta) using molecular, morphometric, and paleobiological approaches. <em>American Journal of Botany</em> 102: 921–941. https://doi.org/10.3732/ajb.1500004</p>
<p>Voloshko, L.N. (2009) New taxa of the genus <em>Mallomonas</em> (Chrysophyta, Synurophyceae) from lakes of the Polar Ural. <em>Russian Botanical Journal</em> 94: 1068–1076.</p>
<p>Voloshko, L.N. (2010) The chrysophycean algae from glacial lakes of Polar Ural (Russia). <em>Nova Hedwigia Beiheft</em> 136: 191–211. https://doi.org/10.1127/1438-9134/2010/0136-0191</p>
<p>Vorobyova, S.S., Bondarenko, N.A., Karpova, S.A., Pomazkina, G.V. & Tanichev, A.I. (1992) To studies of Chrysophyta species composition of Lake Baikal. <em>Algologia</em> 2: 68–72. [in Russian]</p>
<p>Asmund, B. (1959) Electron microscope observations on <em>Mallomonas</em> species and remarks on their occurrence in some Danish ponds and lakes III. <em>Dansk botanisk arkiv</em> 18: 1–50.</p>
<p>Asmund, B. & Kristiansen, J. (1986) The genus <em>Mallomonas</em> (Chrysophyceae). A taxonomic survey based on the ultrastructure of silica scales and bristles. <em>Opera Botanica</em> 85: 1–128.</p>
<p>Balonov, I.M. & Kuzmina, A.E. (1986) Chrysophyta. <em>In</em>: Votinzev, K.K. (Ed.) <em>Hydrochemical and hydrobiological studies in on the Khantay Reservoir</em>. Nauka, Novosibirsk. 119 pp.</p>
<p>Bessudova, A., Domysheva, V.M., Firsova, A.D. & Likhoshway, Y.V. (2017) Silica-scaled chrysophytes of Lake Baikal. <em>Acta Biologica Siberica</em> 3: 47–56. https://doi.org/10.14258/abs.v3i3.3615</p>
<p>Bessudova, A., Sorokovikova, L.M., Tomberg, I.V. & Likhoshway, Y.V. (2018) Silica-scaled chrysophytes in large tributaries of Lake Baikal. <em>Cryptogamie</em> <em>Algologie</em> 39: 145–165. https://doi.org/10.7872/crya/v39.iss2.2018.145</p>
<p>Bessudova, A., Bukin, Y.S., Sorokovikova, L.M., Firsova, A.D. & Tomberg, I.V. (2018) Silica-scaled Chrysophytes in Small Lakes of the Lower Yenisei Basin, the Arctic. <em>Nova Hedwigia</em> 107: 315–336.</p>
<p>Bessudova, A., Tomberg, I.V., Firsova, A.D., Kopyrina, L.I. & Likhoshway, Y.V. (2019) Silica-scaled chrysophytes in lakes Labynkyr and Vorota of the Sakha (Yakutia) Republic, Russia. <em>Nova Hedwigia Beiheft</em> 148: 35–48. https://doi.org/10.1127/nova-suppl/2019/049</p>
<p>Bessudova, A., Bukin, Y. & Likhoshway, Y. (2021) Dispersal of Silica-Scaled Chrysophytes in Northern Water Bodies. <em>Diversity</em> 13: 284. https://doi.org/ 10.3390/d13070284</p>
<p>Boenigk, J., Wodniok, S., Bock, C., Beisser, D., Hempel, C. & Grossmann, L. (2018) Geographic distance and mountain ranges structure freshwater protist communities on a European scalе. <em>Metabarcoding Metagenomics</em> 2: e21519. http://dx.doi.org/10.3897/mbmg.2.21519</p>
<p>Gusev, E.S. & Kulikovskiy, M.S. (2013) A new species of the genus <em>Mallomonas</em> (Chrysophyceae: Synurales), <em>Mallomonas kuzminii</em> <em>sp. nov.</em>, from lake Frolikha (Russia, Baikal region). <em>Phytotaxa</em> 155: 66–70. https://doi.org/10.11646/phytotaxa.155.1.6</p>
<p>Gusev, E., Čertnerová, D., Škaloudová, M. & Škaloud, P. (2018) Exploring cryptic diversity and distribution patterns in the <em>Mallomonas kalinae/rasilis</em> species complex with a description of a new taxon <em>Mallomonas furtiva</em> <em>sp. nov.</em> <em>Journal of Eukaryotic Microbiology</em> 65: 38–47. https://doi.org/10.1111/jeu.12427</p>
<p>Gusev, E.S., Guseva, E.E. & Gabyshev, V.A. (2018) Taxonomic composition of silica-scaled chrysophytes in rivers and lakes of Yakutia and Magadanskaya oblast (Russia). <em>Nova Hedwigia Beiheft</em> 147: 105–117.</p>
<p>Harris, K. & Bradley, D.E. (1960) A taxonomic study of <em>Mallomonas</em>. <em>Journal of General Microbiology</em> 22: 750–777. https://doi.org/10.1099/00221287-22-3-750</p>
<p>Jo, B.Y., Shin, W., Boo, S.M., Kim, H.S. & Siver, P.A. (2011) Studies on ultrastructure and three-gene phylogeny of the genus <em>Mallomonas</em> (Synurophyceae). <em>Journal of Phycology</em> 47: 415–425. https://doi.org/10.1111/j.1529-8817.2010.00953.x</p>
<p>Jo, B.Y., Shin, W., Kim, H.S., Siver, P.A. & Andersen, R.A. (2013) Phylogeny of the genus <em>Mallomonas </em>(Synurophyceae) and descriptions if five new species on the basis of morphological evidence. <em>Phycologia</em> 52: 266–278. https://doi.org/10.2216/12-107.1</p>
<p>Kim, H.S., Kim, J.H., Shin, W. & Jo, B.Y. (2014) <em>Mallomonas elevata</em> <em>sp. nov.</em> (Synurophyceae), a new scaled Chrysophyte from Jeju Island, South Korea. <em>Nova Hedwigia</em> 98: 89–102. https://doi.org/10.1127/0029-5035/2013/0138</p>
<p>Kozhov, M.M. (1950) <em>Fresh waters of East Siberia</em>. Irkutskoe oblastnoye izdatelstvo. Irkutsk. 367 pp.</p>
<p>Kristiansen, J., Düwel, L. & Wegeberg, S. (1997) Silica-scaled chrysophytes from the Taymyr Peninsula, Northern Siberia. <em>Nova Hedwigia</em> 65: 337–351. https://doi.org/10.1127/nova.hedwigia/65/1997/337</p>
<p>Kristiansen, J. & Preisig, H.R. (2007) Chrysophyta and Haptophyta Algae, 2nd part. Synurophyceae. <em>In</em>: Büdel, B., Gärtner, G., Krienitz, L., Preisig, H.R. & Schagerl, M. (Eds.) <em>Süsswasserflora von Mitteleuropa (Freshwater flora of Central Europe)</em> 1/2. Springer-Verlag, Berlin, 252 pp.</p>
<p>Kuzmin, G.V. & Kuzmina, V.A. (1986) Species of the genus <em>Mallomonas</em> (Chrysophyta) from waterbodies of the Magadanskaya oblast. <em>Russian Botanical Journal</em> 71: 805–807.</p>
<p>Kuzmin, G.V. & Kuzmina, V.A. (1987) Silica-scaled chrysophytes from Magadanskaya oblast. <em>News of the taxonomy of lower plants</em> 24: 40–42.</p>
<p>Němcová, Y., Kreidlova, J., Pusztai, M. & Neustupa, J. (2013) <em>Mallomonas pumilio</em> group (Chrysophyceae/Stramenopiles) – a revision based on the scale/scalecase morphology and geometric morphometric data. <em>Nova Hedwigia Beiheft</em> 142: 27–49.</p>
<p>Němcová, Y., Pichrtova, M. & Zeisek, V. (2015) <em>Mallomonas alpestrina</em> <em>sp. nov.</em> (Synurales, Chrysophyceae, Stramenopiles) and its spineless relatives - <em>Mallomonas alata</em> group. <em>Phytotaxa</em> 222: 111–120. http://dx.doi.org/10.11646/phytotaxa.222.2.3</p>
<p>Němcová, Y. & Rott, E. (2018) Diversity of silica-scaled chrysophytes in high-altitude Alpine sites (North Tyrol, Austria) including a description of <em>Mallomonas pechlaneri</em> <em>sp. nov.</em> <em>Cryptogamie Algologie</em> 39 (1): 35–62. https://doi.org/10.7872/crya/v39.iss1.2018.63</p>
<p>Neustupa, J. & Němcová, Y. (2007) A geometric morphometric study of the variation in scales of <em>Mallomonas striata</em> (Synurophyceae, Heterokontophyta). <em>Phycologia</em> 46: 123–130. http://dx.doi.org/10.2216/05-61.1</p>
<p>Perty, J.A.M. (1852) <em>Zur Kenntniss kleinster Lebensformen nach Bau, Funktionen, Systematik, mit Specialverzeichniss der in der Schweiz beobachteten</em>. Jent & Reinert, Bern, 228 pp.</p>
<p>Siver, P.A. (1991) The biology of <em>Mallomonas</em>: morphology, taxonomy and ecology. <em>Developments in Hydrobiology</em> 63: 1–230. https://doi.org/10.1007/978-94-011-3376-0_1</p>
<p>Siver, P.A. (2018) <em>Mallomonas skogstadii</em> <em>sp. nov.</em> and <em>M. bakeri</em> <em>sp. nov.</em> two new fossil species from the middle Eocene representing extinct members of the section Heterospinae? <em>Cryptogamie Algologie</em> 39 (4): 511–524. http://dx.doi.org/10.7872/crya/v39.iss4.2018.511</p>
<p>Silver, P.A. & Wolfe, A.P. (2010) A whole-cell reconstruction of <em>Mallomonas porifera </em>Siver and Wolfe from the Eocene: Implications for the evolution of chrysophyte cell architecture. <em>Nova Hedwigia Beiheft</em> 136: 117–127. https://doi.org/10.1127/1438-9134/2010/0136-0117</p>
<p>Siver, P.A. & Wolfe, A.P. (2016) <em>Mallomonas elephanthus</em> <em>sp. nov.</em> (Synurophyceae), an extinct fossil lineage bearing unique scales from the Eocene. <em>Nova Hedwigia </em>103: 211–223. https://doi.org/10.1127/nova_hedwigia/2016/0346</p>
<p>Siver, P.A., Jo, B.Y., Kim, J.I., Shin, W., Lott, A.M. & Wolfe, A.P. (2015) Assessing the evolutionary history of the class Synurophyceae (Heterokonta) using molecular, morphometric, and paleobiological approaches. <em>American Journal of Botany</em> 102: 921–941. https://doi.org/10.3732/ajb.1500004</p>
<p>Voloshko, L.N. (2009) New taxa of the genus <em>Mallomonas</em> (Chrysophyta, Synurophyceae) from lakes of the Polar Ural. <em>Russian Botanical Journal</em> 94: 1068–1076.</p>
<p>Voloshko, L.N. (2010) The chrysophycean algae from glacial lakes of Polar Ural (Russia). <em>Nova Hedwigia Beiheft</em> 136: 191–211. https://doi.org/10.1127/1438-9134/2010/0136-0191</p>
<p>Vorobyova, S.S., Bondarenko, N.A., Karpova, S.A., Pomazkina, G.V. & Tanichev, A.I. (1992) To studies of Chrysophyta species composition of Lake Baikal. <em>Algologia</em> 2: 68–72. [in Russian]</p>