Abstract
A new species, Spiniferomonas sibirica, has been described using scanning and transmission electron microscopy. It is characterized by a unique combination of three types of plate-scales, each with a single lacuna: elliptical and/or rounded, and rounded-to-ovoid with an incomplete bridge. The morphological relationship of the new taxon with other Spiniferomonas species is discussed. S. sibirica was discovered in the mouths of the main tributaries of the Angara River in Siberia in May, with water temperatures ranging from 11.3 to 14.6 ℃ and pH values of 7.8 to 8.4.
References
- Balonov, I.M. (1978) Electron microscopic study of species of the genus Spiniferomonas Takahashi (Chrysophyta). Botanicheskiy Zhurnal 63: 1639–1647. [In Russian]
- Bessudova, A.Yu., Gabyshev, V.A., Firsova, A.D., Gabysheva, O.I., Bukin, Y.S. & Likhoshway, Y.V. (2021) Diversity of silica-scaled chrysophytes and physicochemical parameters of their environment in the estuaries of rivers in the Arctic watershed of Yakutia, Russia. Sustainability 13: 13768. https://doi.org/10.3390/su132413768
- Bessudova, A., Gabyshev, V., Bukin, Yu., Gabysheva, O. & Likhoshway, Ye.V. (2022) Species richness of scaled сhrysophytes in arctic waters in the Tiksi Region (Yakutia, Russia). Acta Biologica Sibirica 8: 431–459. https://doi.org/10.5281/zenodo.7710355
- Bessudova, A.Yu., Firsova, A.D., Bukin, Y., Kopyrina, L., Zakharova, Y. & Likhoshway, Y. (2023) Under-ice development of silica-scaled chrysophytes with different trophic mode in two ultraoligotrophic lakes of Yakutia. Diversity 15 (3): 431–459. https://doi.org/10.3390/d15030326
- Bessudova, A. (2024) Genus Spiniferomonas (Chrysophyceae, Chromulinales) in Eastern Siberian reservoirs. Acta Biologica Sibirica 10: 859–881. https://doi.org/10.5281/zenodo.13626825
- Bessudova, A.Y., Firsova, A.D., Galachyants, Yu.P., Petrova, D.P., Nalimova, M.A., Sakirko, M.V. & Likhoshway, Ye.V. (2025) Influence of tributaries on the species richness of silica-scaled chrysophytes in the Angara River (Russia, Eastern Siberia). Acta Biologica Sibirica 11: 937–967. https://doi.org/10.5281/zenodo.17132371
- Ito, H. & Takahashi, E. (1992) Chrysophytes in the southern part of Hyogo Prefecture, Japan (IV) Two new species, Spiniferomonas hamata and S. nichollsii (Chrysophyceae, Paraphysomonadaceae). Japanese Journal of Phycology 40: 181–184.
- Kapustin, D. & Kulikovskiy, M. (2022) Chrysosphaerella septentrionalis sp. nov. (Chrysophyceae, Chromulinales), a new species from the Arctic including the description of Chrysosphaerellaceae, fam. nov. Plants 11: 3166. https://doi.org/10.3390/plants11223166
- Kapustin, D. (2024) An updated checklist of the silica-scaled chrysophytes from Russia. Phytotaxa 669: 165–193. https://doi.org/10.11646/phytotaxa.669.3.1
- Kristiansen, J. & Škaloud, P. (2017) Chrysophyta. In: Archibald, J.M., Simpson, A.G.B. & Slamovits, C.H. (Eds.) Handbook of the Protists. 2nd ed. Springer International Publishing, Cham, Switzerland, pp. 331–366. https://doi.org/10.1007/978-3-319-28149-0_43
- Lauterborn, R. (1896) Diagnosen neuer Protozoen aus dem Gebiete des Oberrheins. Zoologischer Anzeiger 19: 14–18.
- Lengyel, E., Barreto, S., Padisak, J., Stenger‑Kovacs, C., Lazar, D. & Buczko, K. (2023) Contribution of silica‑scaled chrysophytes to ecosystems services: a review. Hydrobiologia 850: 2735–2756. https://doi.org/10.1007/s10750-022-05075-5
- Nicholls, K.H. (1981) Spiniferomonas (Chrysophyceae) in Ontario lakes including a revision and descriptions of two new species. Canadian Journal of Botany 59: 107–117. https://doi.org/10.1139/b81-018
- Nicholls, K.H. (1984) Spiniferomonas septispina and S. enigmata, two new algal species confusing the distinction between Spiniferomonas and Chrysosphaerella (Chrysophyceae). Plant Systematics and Evolution 148: 103–117. https://doi.org/10.1007/BF00984572
- Nielsen, Y. (1994) Spiniferomonas abrupta, sp. nov. and some rare species of Synurophyceae and Chrysophyceae, not formerly recorded from Denmark. Nordic Journal of Botany 14: 473–480. https://doi.org/10.1111/j.1756-1051.1994.tb00636.x
- Olsen, N.E., Poulsen, L.K., Reuss, N. & Steinarsdottir, S.S. (1999) A new subspecies of Paraphysomonas punctata (Paraphysomonadaceae, Chrysophyceae). Nordic Journal of Botany 19: 635–640. https://doi.org/10.1111/j.1756-1051.1999.tb01153.x
- Preisig, H.R. & Hibberd, D.J. (1983) Ultrastructure and taxonomy of Paraphysomonas and related genera 3. Nordic Journal of Botany 3: 695–723. https://doi.org/10.1111/j.1756-1051.1983.tb01481.x
- Pusztai, M., Jadrná, I. & Skaloud, P. (2023) Elucidating the phylogeny and taxonomic position of the genus Spiniferomonas Takahashi (Chrysophyceae). Fottea 23: 217–222. https://doi.org/10.5507/fot.2023.006
- Siver, P.A. (1987) Spiniferomonas breakneckii, a new species of freshwater Chrysophyceae. British Phycological Journal 22: 97–100. https://doi.org/10.1080/00071618700650121
- Siver, P.A. (1988) Spiniferomonas triangularis sp. nov., a new silica-scaled freshwater flagellate (Chrysophyceae, Paraphysomonadaceae). British Phycological Journal 23 (4): 379–383. https://doi.org/10.1080/00071618800650401
- Siver, P.A., Voloshko, L.N., Gavrilova, O.V. & Getsen, M.V. (2005) The scaled chrysophyte flora of the Bolshezemelskaya tundra. Nova Hedwigia Beiheft 128: 125–150.
- Takahashi, E. (1973) Studies on genera Mallomonas and Synura, and other plankton in freshwater with the electron microscope. VII. New genus Spiniferomonas of the Synuraceae (Chrysophyceae). Botanical Magazine, Tokyo 86: 75–88. https://doi.org/10.1007/BF02488517
- Voloshko, L.N. (2008) A modern classification of chrysophycean algae (Chrysophyta). Botanicheskiy Zhurnal 93: 1250–1264. [In Russian]
- Voloshko, L.N. (2013) Species of the genus Spiniferomonas (Chrysophyceae, Paraphysomonadaceae) in waterbodies of North Russia. Botanicheskiy Zhurnal 98: 848–867. [In Russian] https://doi.org/10.1134/S1234567813070033