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Type: Article
Published: 2025-06-11
Page range: 86-96
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Two new species of the genus Mallomonas (Chrysophyceae) from ephemeral pools in the steppe zone of the Southern Urals, Russia

Institute for Cellular and Intracellular Symbiosis of the Ural Branch of the Russian Academy of Sciences of the Orenburg Federal Research Center RAS, Pionerskaya Street, 11, 460000, Orenburg, Russia
Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky Prospect, 33, 119071, Moscow, Russia
Institute for Cellular and Intracellular Symbiosis of the Ural Branch of the Russian Academy of Sciences of the Orenburg Federal Research Center RAS, Pionerskaya Street, 11, 460000, Orenburg, Russia
Mallomonas new species section Torquatae Southern Urals silica-scaled chrysophytes Algae

Abstract

Two new species, Mallomonas kalmykovae and M. prominentia, are described from small ephemeral pools, located in the steppe zone of the Southern Urals (Russia), based on silica-scale morphology observed using scanning and transmission electron microscopy. Both species belong to section Torquatae, series Mangoferae, and are similar to M. favosa. For M. kalmykovae, characteristic features include oval-rhombic scales, the presence of three longitudinal ribs on the wide arms of the posterior submarginal rib, and 2–3 rows of meshes on the shield arranged in parallel rows along the posterior submarginal rib. Scales of M. prominentia are characterized by the presence of a raised shield, a groove between the shield and the posterior submarginal rib and a wide anterior flange. The shield on the body scales of M. prominentia is raised to a greater extent in the proximal part, forming a protrusion over the posterior submarginal rib.

References

  1. Asmund, B. & Kristiansen, J. (1986) The genus Mallomonas (Chrysophyceae). A taxonomic survey based on the ultrastructure of silica scales and bristles. Opera Botanica 85: 1–128.
  2. Couté, A. & Franceschini, I.M. (1998) Scale-Bearing Chrysophytes from Acid Water of Florianopolis, Santa Catarina Island, South Brazil. Algological Studies 88: 37–61. https://doi.org/10.1127/algol_stud/88/1998/37
  3. De Saedeleer, H. (1929) Notules systématiques. VI. Physomonas. Annales de Protistologie 2: 177–178.
  4. Dürrschmidt, M. & Croome, R. (1985) Mallomonadaceae (Chrysophyceae) from Malaysia and Australia. Nordic journal of botany 5: 285–298. https://doi.org/10.1111/j.1756-1051.1985.tb01657.x
  5. Ehrenberg, C.G. (1834) Dritter Beitrag zur Erkenntniss grosser Organisation in der Richtung des kleinsten Raumes. Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin 1833: 145–336.
  6. Franceschini, I.M. & Kristiansen, J.M. (2004) New records of scale-bearing chrysophytes for Florianópolis, Santa Catarina Island, Southern Brazil. Algological Studies 111: 63–77. https://doi.org/10.1127/1864-1318/2004/0111-0063
  7. Gusev, E. & Kezlya, E. (2021) Mallomonas lusca sp. nov. (Synurales, Chrysophyceae)—a rare species from Southeast Asia. Phytotaxa 529: 105–112. https://doi.org/10.11646/phytotaxa.529.1.8
  8. Gusev, E., Martynenko, N., Shkurina, N., Huan, P.T., Dien, T.D. & Thanh, N.T.H. (2023) An annotated checklist of algae from the order Synurales (Chrysophyceae) of Viet Nam. Diversity 15: 183. https://doi.org/10.3390/d15020183
  9. Gusev, E., Ignatenko, M. & Yatsenko-Stepanova, T. (2024a) Mallomonas uralensis sp. nov. (Chrysophyceae, Synurales), a new species of the genus Mallomonas from the section Torquatae. Phytotaxa 655: 293–300. https://doi.org/10.11646/phytotaxa.655.3.7
  10. Gusev, E.S., Martynenko, N.A., Podunay, Y.A. & Kuzmin, D.V. (2024b) Morphology, phylogenetic position and distribution of Mallomonas mangofera and Mallomonas foveata comb. et stat. nov. (Synurales, Chrysophyceae) Phytotaxa 662: 224–238. https://doi.org/10.11646/phytotaxa.662.3.2
  11. Gusev, E., Martynenko, N., Tran, H. & Podunay, Y. (2024c) Two new species of the Mallomonas mangofera species complex (Synurales, Chrysophyceae) from the tropics based on morphological and molecular studies. Phytotaxa 678: 17–32. https://doi.org/10.11646/phytotaxa.678.1.2
  12. Gusev, E.S., Podunay, Y.A., Martynenko, N.A., Tran, H. & Kuzmin, D.V. (2024d) Mallomonas gemina comb. et stat. nov. (Synurales, Chrysophyceae)—a new combination based on molecular studies. Phytotaxa 665: 221–232. https://doi.org/10.11646/phytotaxa.665.3.4
  13. Hällfors, G. & Hällfors, S. (1988) Records of chrysophytes with siliceous scales (Mallomonadaceae and Paraphysomonadaceae) from Finnish innland waters. In: Jones, R. & Ilmavirta, V. (Eds.) Flagellates in freshwater ecosystems. Hydrobiologia 161. pp. 1–29. https://doi.org/10.1007/978-94-009-3097-1_1
  14. Harris, K. & Bradley, D.E. (1960) A taxonomic study of Mallomonas. The Journal of General Microbiology 22: 750–777. https://doi.org/10.1099/00221287-22-3-750
  15. Ignatenko, M.E., Yatsenko-Stepanova, T.N. & Urzhumov, A.A. (2021) New records of Mallomonas species (Chrysophyceae, Synurales) for the Orenburg Region (South Urals, Russia). Novosti sistematiki nizshikh rastenii 55: 315–323. [In Russian] https://doi.org/10.31111/nsnr/2021.55.2.315
  16. Ignatenko, M., Gusev, E. & Yatsenko-Stepanova, T. (2023) Diversity of Silica-Scaled Chrysophytes in the Steppe Zone of the Southern Urals with a Description of a New Species from the Genus Mallomonas. Life 13: 2214. https://doi.org/10.3390/life13112214
  17. Ignatenko, M., Gusev, E. & Yatsenko-Stepanova, T. (2024a) Mallomonas paraperfossa sp. nov. (Chrysophyceae, Synurales), a new species from the shallow ephemeral ponds in the steppe zone of the Southern Urals, Russia. Phytotaxa 650: 277–284. https://doi.org/10.11646/phytotaxa.650.3.8
  18. Ignatenko, M.E., Yatsenko-Stepanova, T.N., Mindolina, Yu.V. & Nasyrova, M.A. (2024b) Contribution to the flora of chrysophytes (Chrysophyceae: Chromulinales, Paraphysomonadales) of the waterbodies of the steppe zone (Orenburg Region). Botanicheskii zhurnal 109 (5): 484–501. [In Russian] https://doi.org/10.31857/S0006813624050069
  19. Kapustin, D.A. & Guiry, M.D. (2019) Reinstatement of Lepidochromonas Kristiansen (Lepidochromonadaceae fam. nov., Chrysophyceae). Phytotaxa 413: 49–53. https://doi.org/10.11646/phytotaxa.413.1.5
  20. Kristiansen, J. (1980) Chrysophyceae from some Greek lakes. Nova Hedwigia 33: 167–194.
  21. Kristiansen, J. (2000) Cosmopolitan chrysophytes. Systematics and Geography of Plants 70: 291–300. https://doi.org/10.2307/3668648
  22. Kristiansen, J. & Preisig, H.R. (2007) Chrysophyte and Haptophyte Algae, 2nd part. Synurophyceae. In: Büdel, B., Gärtner, G., Krienitz, L., Preisig, H.R. & Schagerl, M. (Eds.) Süsswasserflora von Mitteleuropa. 1/2. Springer-Verlag, Berlin, 252 pp.
  23. Lauterborn, R. (1896) Diagnosen neuer Protozoen aus dem Gebiete des Oberrheins. Zoologischer Anzeiger 19: 14–18.
  24. Lott, A.M. & Siver, P.A. (2005) An inventory of scaled chrysophytes from the Atlantic Coastal Plain of North Carolina, USA. In: Kristiansen, J. & Cronberg, G. (Eds.) Chrysophytes: Past and Present, Proceedings of the Sixth International Chrysophyte Symposium, Lami, Finland. Nova Hedwigia Beiheft 128: pp. 211–229.
  25. Němcová, Y. (2010) Diversity and ecology of silica-scaled chrysophytes (Synurophyceae, Chrysophyceae) in the National Nature Monument Swamp and Břehyň ský Pond, Czech Republic. Cryptogamie Algologie 31: 229–243.
  26. Němcová, Y., Kreidlová, J., Kosová, A. & Neustupa, J. (2012) Lakes and pools of Aquitaine region (France)–a biodiversity hotspot of Synurales in Europe. Nova Hedwigia Beiheft 95: 1–24. https://doi.org/10.1127/0029-5035/2012/0036
  27. Němcová, Y., Kreidlová, J., Pusztai, M. & Neustupa, J. (2013) Mallomonas pumilio group (Chrysophyceae/Stramenopiles)—a revision based on the scale/scale-case morphology and analysis of scale shape. Nova Hedwigia Beiheft 142: 27–49.
  28. Nicholls, K.H. (1984) Four new Mallomonas species of the Torquatae series (Chrysophyceae). Canadian Journal of Botany 62: 1583–1591. https://doi.org/10.1139/b84-213
  29. Perty, M. (1852) Zur Kenntniss kleinster Lebensformen nach Bau, Funktionen, Systematik, mit Specialverzeichniss der in der Schweiz beobachteten. Jent & Reinert, Bern, 228 pp.
  30. Péterfi, L.S. & Momeu, L. (1980) Numerical taxonomy of the genus Mallomonas Perty. Contribuţii Botanice Cluj-Napoca 1980: 19–24.
  31. Preisig, H.R. & Hibberd, D.J. (1983) Ultrastructure and taxonomy of Paraphysomonas (Chrysophyceae) and related genera. 3. Nordic Journal of Botany 3: 695–723.
  32. Safronova, T.V. & Shadrina, S.N. (2020) New and noteworthy species of Chrysophyta for the Russian flora. Novosti sistematiki nizshikh rastenii 54: 371–380. https://doi.org/10.31111/nsnr/2020.54.2.371
  33. Siver, P.A. & Wujek, D.E. (1999) Scaled Chrysophyceae and Synurophyceae from Florida, U.S.A.: VI. Observations on the flora from waterbodies in the Ocala National Forest. Nova Hedwigia 68: 75–92. https://doi.org/10.1127/nova.hedwigia/68/1999/75
  34. Siver, P.A. & Lott, A.M. (2004) Further observations on the scaled Chrysophycean and Synurophycean flora of the Ocala National Forest, Florida, USA. Nordic journal of botany 24: 211–233. https://doi.org/10.1111/j.1756-1051.2004.tb00835.x
  35. Siver, P.A. & Lott, A.M. (2017) The Scaled Chrysophyte Flora in Freshwater Ponds and Lakes from Newfoundland, Canada, and their Relationship to Environmental Variables. Cryptogamie, Algologie 38: 325–347. https://doi.org/10.7872/crya/v38.iss4.2017.325
  36. Snitko, L.V., Snitko, V.P., Blinov, I.A. & Voloshko, L.N. (2016) Chrysophycean algae (Chrysophyceae, Synurophyceae) in waterbodies of the eastern foothills of the South and Middle Urals. Botanicheskii zhurnal 101 (12): 1361–1378. [In Russian] https://doi.org/10.1134/S0006813619040094
  37. Snitko, L.V., Snitko, V.P., Blinov, I.A. & Voloshko, L.N. (2019) Chrysophycean algae in waterbodies of the South Urals. Genus Chrysosphaerella (Paraphysomonadaceae). Botanicheskii zhurnal 104 (4): 587–601. [In Russian] https://doi.org/10.1134/S0006813619040094
  38. Snitko, L.V., Snitko, V.P. & Safronova, T.V. (2020) Chrysophycean Algae in waterbodies of the South Urals. II. Genus Mallomonas (Synurophyceae, Mallomonadaceae). Botanicheskii zhurnal 105 (4): 368–383. [In Russian] https://doi.org/10.31857/S0006813620040080
  39. Snitko, L.V., Safronova, T.V., Blinov, I.A. & Snitko, V.P. (2021) New Species of Synura Section Synura (Chrysophyceae, Synurales, Synuraceae) in Waterbodies of the South Urals. Botanicheskii zhurnal 106 (11): 1101–1112. [In Russian] https://doi.org/10.31857/S0006813621110107
  40. Snitko, L.V., Safronova, T.V. & Snitko, V.P. (2022) Chrysophycean algae (Chrysophyceae) in waterbodies of the South Urals and Transural Plateau. Genus Synura (Synuraceae) Section Petersenianae. Botanicheskii zhurnal 107 (4): 333–349. [In Russian] https://doi.org/10.31857/S0006813622030061
  41. Takahashi, E. (1973) Studies on genera Mallomonas and Synura, and other plankton in freshwater with the electron microscope. VIII. New genus Spiniferomonas of the Synuraceae (Chrysophyceae). Botanical Magazine Tokyo 86: 75–88. https://doi.org/10.1007/BF02488517
  42. Voropaev, S.B. & Novozhenin, I.A. (2013) Natural conditions and features of soil formation factors in the Southern Urals. Bulletin of OSU 10 (159): 241–243. [In Russian]
  43. Vyverman, W. & Cronberg, G. (1993) Scale bearing chrysophytes from Papua New Guinea. Nordic journal of botany 13: 111–120. https://doi.org/10.1111/j.1756-1051.1993.tb00022.x
  44. Wei, Y.X., Yuan, X.P. & Kristiansen, J. (2014) Silica-Scaled Chrysophytes from Hainan, Guangdong Provinces and Hong Kong Special Administrative Region, China. Nordic journal of botany 32: 881–896. https://doi.org/10.1111/njb.00493
  45. Wujek, D.E. & Igoe, M.J. (1989) Studies on Michigan Chrysophyceae. VII. Beiheft zur Nova Hedwigia 95: 269–280.

How to Cite

Ignatenko, M., Gusev, E. & Yatsenko-Stepanova, T. (2025) Two new species of the genus Mallomonas (Chrysophyceae) from ephemeral pools in the steppe zone of the Southern Urals, Russia. Phytotaxa 705 (1): 86–96. https://doi.org/10.11646/phytotaxa.705.1.7