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Description of the New Species Mallomonas limbata sp. nov. (Synurales, Chrysophyceae) from Water Bodies of Vietnam

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Abstract

A new species, Mallomonas limbata sp. nov., is described from Vietnam. The description is based on silica-scale morphology studied by means of transmission and scanning electron microscopy. The species belongs to the section Planae and has a similar morphology with species from the Mallomonas matvienkoae complex. The new species has ovoid scales, narrowed distally, and a developed secondary silica layer with internal reticulation with rounded meshes, occupying up to 4/5 of the scale surface, with numerous papillae on the surface. Scales of M. limbata have been found at 26 localities in 9 provinces of Vietnam. The distributions and habitat conditions of the new species are summarized.

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ACKNOWLEDGMENTS

We are deeply grateful to our Vietnamese and Russian colleagues, the administration and staff of the Joint Vietnam-Russia Tropical Science and Technology Research Center for their assistance in organizing and carrying out expeditionary work, and Dr. Lam Nguyen Ngoc for assistance in collecting material on the Côn Sơn Island, as well as to the staff of the Center for Collective Use of Electron Microscopy at the Papanin Institute of Biology of Inland Waters, Russian Academy of Sciences, for assistance with electron microscopes.

Funding

Processing and analysis of the material, as well as the works with scanning and transmission microscopes, were carried out with financial support from the Russian Science Foundation (project no. 20-14-00211). The analysis of environmental parameters was carried out as part of the State Task of the Komarov Botanical Institute, Russian Academy of Sciences (no. 121021600184-6). Expeditions was carried out with the financial support of the Joint Vietnam–Russia Tropical Science and Technology research Center (Ecolan 3.2 project).

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Authors and Affiliations

  1. Komarov Botanical Institute, Russian Academy of Sciences, St. Petersburg, Russia

    T. V. Safronova

  2. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow, Russia

    E. S. Gusev

  3. Coastal Branch of the Joint Vietnam–Russia Tropical Science and Technology Research Center, Nha Trang, Vietnam

    L. Nguyen Thi

Authors
  1. T. V. Safronova
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  2. E. S. Gusev
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  3. L. Nguyen Thi
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Correspondence to T. V. Safronova.

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Translated by T. Kuznetsova

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Safronova, T.V., Gusev, E.S. & Thi, L.N. Description of the New Species Mallomonas limbata sp. nov. (Synurales, Chrysophyceae) from Water Bodies of Vietnam. Inland Water Biol 17, 82–89 (2024). https://doi.org/10.1134/S1995082924010139

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