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Issue: Vol. 780 No. 3: 16 Oct. 2026
Type: Article
Published: 2026-10-16
DOI: 10.11646/phytotaxa.780.3.7
Page range: 285-293
Abstract views: 21
PDF downloaded: 0

Achnanthidium stelleri sp. nov. (Achnanthidiaceae, Bacillariophyceae)—a new species from the A. pyrenaicum morphological group

Timiryazev Institute of Plant Physiology RAS; 35 Botanicheskaya St.; 127276 Moscow; Russia
Timiryazev Institute of Plant Physiology RAS; 35 Botanicheskaya St.; 127276 Moscow; Russia
Timiryazev Institute of Plant Physiology RAS; 35 Botanicheskaya St.; 127276 Moscow; Russia
Algae Kamchatka monoraphid diatoms morphology new species Achnanthidium

Abstract

A new species of Achnanthidium is described from freshwater environments of the Kamchatka Peninsula—A. stelleri sp. nov. It is characterized by linear-lanceolate valves with wedge-shaped ends, distal raphe ends that are bent to one side, and finely punctate striae. The new species closely resembles several other Achnanthidium taxa with bent distal raphe ends, which are A. pseudoconspicuum, A. pyrenaicum, A. crassum and A. rivulare; a comparison with those taxa is given, which shows that A. stelleri sp. nov. can be clearly differentiated by valve outline, striae structure and density, and structure of the central area.

References

  1. Barinova, S. & Medvedeva, L. (1996) Atlas of Algae-Saprobity Indicators. Russian Far East. Dal’nauka, Vladivostok, 364 pp. [In Russian].
  2. Czarnecki, D.B. (1994) The freshwater diatoms culture collection at Loras College, Dubuque, Iowa. In: Kociolek, J.P. (Ed.) Proceedings of the 11th International Diatom Symposium. Memoirs of the California Academy of Sciences 17: pp. 155–174.
  3. Elenkin, A.A. (1914) Freshwater algae of Kamchatka. In: Elenkin, A.A. (Ed.) Kamchatka Expedition of Fedor Pavlovich Ryabushinsky, organized with the assistance of the Imperial Russian Geographic Society. Botanical Section. Issue II. Cryptogamic Plants of Kamchatka: 1) Algae, 2) Fungi. Typography of P.P. Ryabushinsky, Moscow, pp. 3–404. [In Russian].
  4. Genkal, S. & Lepskaya, E. (2014) The diatom flora of salmon lakes of Koryak Highlands, Kamchatka. Research of aquatic biological resources of Kamchatka and the northwestern part of the Pacific Ocean 35: 31–47. [In Russian]. https://doi.org/10.15853/2072-8212.2014.35.31-47
  5. Genkal, S. & Lepskaya, E. (2015) Materials to the flora of Bacillariophyta in Lake Kronotskoye (The Kamchatka Peninsula, Russia). Algologia 25 (1): 74–82. [In Russian]. https://doi.org/10.15407/alg25.01.074
  6. Genkal, S. & Lepskaya, E. (2023) Diatoms (Bacillariophyta) of the Tolmachev reservoir (Kamchatka, Russia). Botanica Pacifica 12 (1): 133–139. [In Russian]. https://doi.org/10.17581/bp.2023.12101
  7. Glushchenko, A., Tseplik, N. & Kulikovskiy, M. (2026) Planothidium krascheninnikovii sp. nov. (Achnanthidiaceae, Bacillariophyceae)—a new large-celled monoraphid species from freshwater environments of the Kamchatka Peninsula, Russia. Phytotaxa 754 (2): 141–157. https://doi.org/10.11646/phytotaxa.754.2.2
  8. Guiry, M.D. & Guiry, G.M. (2026) AlgaeBase. World-wide electronic publication, University of Galway. Available from: https://www.algaebase.org (accessed 31 July 2026)
  9. Jahn, R., Abarca, N., Gemeinholzer, B., Mora, D., Skibbe, O., Kulikovskiy, M., Gusev, E., Kusber, W.-H. & Zimmermann, J. (2017) Planothidium lanceolatum and Planothidium frequentissimum reinvestigated with molecular methods and morphology: four new species and the taxonomic importance of the sinus and cavum. Diatom Research 32 (1): 75–107. https://doi.org/10.1080/0269249X.2017.1312548
  10. Jüttner, I. & Cox, E.J. (2011) Achnanthidium pseudoconspicum comb. nov.: morphology and ecology of the species and a comparison with related taxa. Diatom Research 26 (1): 21–28. https://doi.org/10.1080/0269249X.2011.573707
  11. Karthick, B., Taylor, J.C. & Hamilton, P.B. (2017) Two new species of Achnanthidium Kützing (Bacillariophyceae) from Kolli Hills, Eastern Ghats, India. Fottea 17 (1): 65–77. https://doi.org/10.5507/fot.2016.020
  12. Kezlya, E., Glushchenko, A. & Kulikovskiy, M. (2024) Diatom diversity from watercourses of north-eastern Kamchatka with description of one new species. Diversity 16: 592. https://doi.org/10.3390/d16090592
  13. Kobayashi, H. (1997) Comparative studies among four linear-lanceolate Achnanthidium species (Bacillariophyceae) with curved terminal raphe endings. Nova Hedwigia 65 (1–4): 147–164. https://doi.org/10.1127/nova.hedwigia/65/1997/147
  14. Kulikovskiy, M., Lange-Bertalot, H., Witkowski, A. & Khursevich, G. (2011) Achnanthidium sibiricum (Bacillariophyceae), a new species from bottom sediments in Lake Baikal. Algological Studies 136/137: 77–87. https://doi.org/10.1127/1864-1318/2011/0136-0077
  15. Kulikovskiy, M., Lange-Bertalot, H. & Witkowski, A. (2013) Gliwiczia gen. nov. a new monoraphid diatom genus from Lake Baikal with a description of four species new for science. Phytotaxa 109 (1): 1–16. https://doi.org/10.11646/phytotaxa.109.1.1
  16. Kulikovskiy, M., Glushchenko, A., Kuznetsova, I., Genkal, S. & Kociolek, J.P. (2020a) Gololobovia gen. nov.—a new genus from Lake Baikal with comments on pore occlusion in monoraphid diatoms. Phycologia 59 (6): 616–633. https://doi.org/10.1080/00318884.2020.1830596
  17. Kulikovskiy, M.S., Glushchenko, A.M., Genkal, S.I., Kuznetsova, I.V. & Kociolek, J.P. (2020b) Platebaikalia a new monoraphid diatom genus from ancient Lake Baikal with comments on the genus Platessa. Fottea 20 (1): 59–67. https://doi.org/10.5507/fot.2019.014
  18. Kulikovskiy, M., Maltsev, Y., Glushchenko, A., Kuznetsova, I., Kapustin, D., Gusev, E., Lange-Bertalot, H., Genkal, S. & Kociolek, J.P. (2020c) Gogorevia, a new monoraphid diatom genus for Achnanthes exigua and allied taxa (Achnanthidiaceae) described on the basis of an integrated molecular and morphological approach. Journal of Phycology 56 (6): 1601–1613. https://doi.org/10.1111/jpy.13064
  19. Kulikovskiy, M.S., Glushchenko, A.M., Genkal, S.I., Kuznetsova, I.V. & Kociolek, J.P. (2022) Revision of monoraphid diatom genus Platessa with description of Platesiberia gen. nov. from Ancient Lake Baikal. Water 14: 2957. https://doi.org/10.3390/w14192957
  20. Kützing, F.T. (1844) Die Kieselschaligen Bacillarien oder Diatomeen. Nordhausen: zu finden bei W. Köhne, pp. 1–152. https://doi.org/10.5962/bhl.title.64360
  21. Liu, Y., Tan, X., Kociolek, J.P., Kulikovskiy, M., Liu, X.X. & Fan, Y.W. (2021) One new species of Achnanthidium Kützing (Bacillariophyta, Achnanthidiaceae) from the upper Han River, China. Phytotaxa 516 (2): 187–194. https://doi.org/10.11646/phytotaxa.516.2.6
  22. Metzeltin, D. & Lange-Bertalot, H. (2007) Tropical Diatoms of South America II. Iconographia Diatomologica 18: 1–877.
  23. Mironov, A., Glushchenko, A., Kezlya, E. & Kulikovskiy, M. (2025) Species composition of the diatom communities in the watercourses of Northeastern Kamchatka with comments on abundant taxa and description of Gomphonema lepskayae sp. nov. Phytotaxa 726 (1): 001–019. https://doi.org/10.11646/phytotaxa.726.1.1
  24. Nikulina, T.V. & Grishchenko, O.V. (2017) Diatom flora of Dachnye thermal springs (Kamchatka Peninsula, Russia). Vladimir Ya. Levanidov’s Biennial Memorial Meetings 7: 185–193. [In Russian].
  25. Nikulina, T.V. & Sorokin, Yu.V. (2021) Diatom flora of the Falshivaya River (Kamchatka). Vladimir Ya. Levanidov’s Biennial Memorial Meetings 9: 129–139. [In Russian]. https://doi.org/10.25221/levanidov.09.14
  26. Nikulina, T.V., Kalitina, E.G., Vakh, E.A. & Kharitonova, N.A. (2016) List of diatoms from three hot springs from Kamchatka—Malkinskiye, Nachikinskiye and Verhne-Paratunskiye (Russia). In: Freshwater Life. Vol. 2. Dal’nauka, Vladivostok, pp. 108–115. [In Russian].
  27. Novais, M.H., Jüttner, I., Van de Vijver, B., Morais, M.M., Hoffmann, L. & Ector, L. (2015) Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): Comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal. Phytotaxa 224: 101–139. https://doi.org/10.11646/phytotaxa.224.2.1
  28. Pérès, F., Barthès, A., Ponton, E., Coste, M., Ten-Hague, L. & Le-Cohu, R. (2012) Achnanthidium delmontii sp. nov., a new species from French rivers. Fottea 12 (2): 189–198. https://doi.org/10.5507/fot.2012.014
  29. Pinseel, E., Vanormelingen, P., Hamilton, P.B., Vyverman, W., Van de Vijver, B. & Kopalová, K. (2017) Molecular and morphological characterization of the Achnanthidium minutissimum complex (Bacillariophyta) in Petuniabukta (Spitsbergen, High Arctic) including the description of A. digitatum sp. nov. European Journal of Phycology 52: 264–280. https://doi.org/10.1080/09670262.2017.1283540
  30. Potapova, M.G. & Ponader, K.C. (2004) Two common North American diatoms, Achnanthidium rivulare sp. nov. and A. deflexum (Reimer) Kingston: morphology, ecology and comparison with related species. Diatom Research 19 (1): 33–57. https://doi.org/10.1080/0269249X.2004.9705606
  31. Rimet, F., Couté, A., Piuz, A., Berthon, V. & Druart, J.C. (2010) Achnanthidium druartii sp. nov. (Achnanthales, Bacillariophyta): A new species invading European rivers. Vie et Milieu 60: 185–195.
  32. Round, F.E. & Bukhtiyarova, L. (1996) Four new genera based on Achnanthes (Achnanthidium) together with a re-definition of Achnanthidium. Diatom Research 11: 345–361. https://doi.org/10.1080/0269249X.1996.9705389
  33. Shkurina, N.A., Lepskaya, E.V. & Belyakova, G.A. (2005) Diatoms of the Lake Dalneye (Kamchatka). Vladimir Ya. Levanidov’s Biennial Memorial Meetings 3: 214–222. [In Russian].
  34. Tseplik, N.D., Maltsev, Y.I., Glushchenko, A.M., Kuznetsova, I.V., Genkal, S.I., Kociolek, J.P. & Kulikovskiy, M.S. (2021a) Achnanthidium tinea sp. nov.—a new monoraphid diatom (Bacillariophyceae) species, described on the basis of molecular and morphological approaches. PhytoKeys 174: 147–163. https://doi.org/10.3897/phytokeys.174.60337
  35. Tseplik, N.D., Maltsev, Y.I., Glushchenko, A.M., Kuznetsova, I.V., Genkal, S.I., Gusev, E.S. & Kulikovskiy, M.S. (2021b) Achnanthidium gladius sp. nov. (Bacillariophyceae)—a new monoraphid diatom species from Indonesia. PhytoKeys 187: 129–140. https://doi.org/10.3897/phytokeys.187.73913
  36. Tseplik, N.D., Glushchenko, A.M., Maltsev, Y.I., Kuznetsova, I.V., Genkal, S.I., Kociolek, J.P. & Kulikovskiy, M.S. (2022) A new monoraphid diatom species from the genus Karayevia sensu lato (Bacillariophyceae: Stauroneidaceae) with remarks on taxonomy and phylogeny of the genus. Diatom Research 37 (1): 39–50. https://doi.org/10.1080/0269249X.2022.2039780
  37. Tseplik, N., Genkal, S., Maltsev, Y., Kuznetsova, I. & Kulikovskiy, M. (2023) Molecular investigation of the Achnanthidium minutissimum complex (Bacillariophyceae) from the Transbaikal Region with the description of three new species. Water 15: 3379. https://doi.org/10.3390/w15193379
  38. Tseplik, N., Maltsev, Y., Glushchenko, A., Genkal, S. & Kulikovskiy, M. (2024a) Two new Planothidium (Achnanthidiaceae, Bacillariophyceae) species with a sinus from the Kamchatka Peninsula, Russia. Phytotaxa 664 (2): 111–122. https://doi.org/10.11646/phytotaxa.664.2.3
  39. Tseplik, N., Maltsev, Y., Glushchenko, A., Genkal, S., Mironova, E. & Kulikovskiy, M. (2024b) New cavum-bearing Planothidium (Achnanthidiaceae, Bacillariophyceae) species from the Kamchatka Peninsula, Russia. Phytotaxa 665 (3): 271–281. https://doi.org/10.11646/phytotaxa.665.3.9
  40. Tseplik, N., Maltsev, Y., Glushchenko, A., Genkal, S. & Kulikovskiy, M. (2025a) Molecular phylogeny of the diatom genus Planothidium with the description of Paraplanothidium gen. nov. and Pseudoplanothidium gen. nov. PLoS One 20 (11): e0333782. https://doi.org/10.1371/journal.pone.0333782
  41. Tseplik, N., Radhakrishnan, C., Karthick, B. & Kulikovskiy, M. (2025b) Indoplatessa gen. nov.—a new monoraphid diatom genus based on Platessa arborea (Achnanthidiaceae, Bacillariophyceae). Phytotaxa 694 (2): 161–172. https://doi.org/10.11646/phytotaxa.694.2.4
  42. Tseplik, N., Glushchenko, A., Maltsev, Y., Genkal, S., Nergui, S. & Kulikovskiy, M. (2025c) Molecular investigation of Nupela mongolica sp. nov. (Bacillariophyceae) with the description of the family Nupelaceae fam. nov. Phytotaxa 681 (2): 186–198. https://doi.org/10.11646/phytotaxa.681.2.4
  43. Tseplik, N., Glushchenko, A. & Kulikovskiy, M. (2026) Skabitschewskia elenkinii sp. nov. (Achnanthidiaceae, Bacillariophyceae)—a new monoraphid diatom species from Kamchatka, Russian Far East. Phytotaxa 756 (3): 240–250. https://doi.org/10.11646/phytotaxa.756.3.3
  44. Wetzel, C.E., Jüttner, I., Gurung, S. & Ector, L. (2019) Analysis of the type material of Achnanthes minutissima var. macrocephala (Bacillariophyta) and description of two new small capitate Achnanthidium species from Europe and the Himalaya. Plant Ecology and Evolution 152 (2): 340–350. https://doi.org/10.5091/plecevo.2019.1628
  45. Wojtal, A.Z., Lange-Bertalot, H., Nautiyal, R., Verma, J. & Nautiyal, P. (2010) Achnanthidium chitrakootense sp. nov. from rivers of northern and central India. Polish Botanical Journal 55 (1): 55–64.
  46. Yu, P., You, Q.M., Pang, W.T. & Wang, Q.X. (2022) Two new freshwater species of the genus Achnanthidium (Bacillariophyta, Achnanthidiaceae) from Qingxi River, China. PhytoKeys 191: 11–28. https://doi.org/10.3897/phytokeys.191.78489

How to Cite

Tseplik, N., Glushchenko, A. & Kulikovskiy, M. (2026) Achnanthidium stelleri sp. nov. (Achnanthidiaceae, Bacillariophyceae)—a new species from the A. pyrenaicum morphological group. Phytotaxa 780 (3): 285–293. https://doi.org/10.11646/phytotaxa.780.3.7