Skip to main content Skip to main navigation menu Skip to site footer
Responsive image
Issue: Vol. 754 No. 2: 5 May 2026
Type: Article
Published: 2026-05-05
DOI: 10.11646/phytotaxa.754.2.2
Page range: 141-157
Abstract views: 0
PDF downloaded: 0

Planothidium krascheninnikovii sp. nov. (Achnanthidiaceae, Bacillariophyceae)—a new large-celled monoraphid species from freshwater environments of the Kamchatka Peninsula, 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
Timiryazev Institute of Plant Physiology RAS, 35 Botanicheskaya St., 127276 Moscow, Russia
Kamchatka monoraphid diatoms morphology new species Planothidium Algae

Abstract

As a result of a study of freshwater diatom flora in Kamchatka, a new species of the genus Planothidium was found: Planothidium krascheninnikovii sp. nov. The species was studied using light and scanning electron microscopy. A comparison was made with morphologically similar species, Planothidium lanceolatoides and P. cyclophorum. The new species is distinguished by strongly silicified valves and the presence of sickle-shaped protrusions at the junction between valve face and mantle of the rapheless valve. The article also presents the history of studies of monoraphid diatoms from the aquatic ecosystems in the Kamchatka Peninsula.

References

  1. Barinova, S. & Medvedeva, L. (1996) Atlas of Algae-Saprobity Indicators. Russian Far East. Dal’nauka, Vladivostok, 364 pp. [In Russian] https://doi.org/10.1017/s0967026298211656
  2. Bukhtiyarova, L. & Round, F.E. (1996) Revision of the genus Achnanthes sensu lato. Psammothidium, a new genus based on A. marginulatum. Diatom Research 11 (1): 1–30. https://doi.org/10.1080/0269249X.1996.9705361
  3. Bory de Saint-Vincent, J.B.G.M. (1822) Achnanthe. Achnanthes. In: Audouin et al. (Eds.) Dictionnaire Classique d'Histoire Naturelle. Vol. 1. pp. 79–80. https://doi.org/10.5962/bhl.title.33901
  4. Cleve, P.T. & Grunow, A. (1880) Beiträge zur Kenntniss der Arctischen Diatomeen. Kongliga Svenska-Vetenskaps Akademiens Handlingar 17 (2): 1–121.
  5. 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: 155–174.
  6. Ehrenberg, C.G. (1837) Zusätze zur Erkenntniss grosser organischer Ausbildung in den kleinsten thierischen Organismen. Abhandlungen der königlichen Akademie der Wissenschaften zu Berlin (für 1835): 151–180. https://doi.org/10.5962/bhl.title.82563
  7. Elenkin, A.A. (1914a) 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]
  8. Elenkin, A.A. (1914b) Marine peridinea and diatoms 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. 405–450. [In Russian]
  9. Fazlutdinova, A., Gabidullin, Y., Allaguvatova, R. & Gaysina, L. (2020) Diatoms in Kamchatka’s hot spring soils. Diversity 12 (11): 435. https://doi.org/10.3390/d12110435
  10. Fazlutdinova, A., Gabidullin, Y., Allaguvatova, R. & Gaysina, L. (2021) Diatoms in volcanic soils of Mutnovsky and Gorely volcanoes (Kamchatka Peninsula, Russia). Microorganisms 9: 1851. https://doi.org/10.3390/microorganisms9091851
  11. Fazlutdinova, A., Allaguvatova, R. & Gaysina, L. (2023) Ecotonic communities of diatoms in the southeastern part of the Kamchatka Peninsula. Earth 4: 209–222. https://doi.org/10.3390/earth4020011
  12. Genkal, S. & Yarushina, M. (2019) Flora of Bacillariophyta in the plankton of tundra ecosystems in the exploration area of the gas condensate field (Yamal Peninsula). Inland Water Biology 12 (4): 373–383. https://doi.org/10.1134/S1995082919040047
  13. 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
  14. 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
  15. 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
  16. Genkal, S.I., Lepskaya, E.V. & Lupikina, E.G. (2007) Diatoms of Khangar Lake (Kamchatka). Botanichesky Zhurnal 92 (10): 1500–1507. [In Russian]
  17. Germain, H. (1957) Achnanthes bioreti n. sp., diatomée nouvelle. Bulletin de la Société Botanique de France 104 (suppl.): 85–86. https://doi.org/10.1080/00378941.1957.10835178
  18. Gregory, W. (1855) On the post-Tertiary lacustrine sand containing diatomaceous exuviae from Glenshire near Inverary. Quarterly Journal of Microscopical Science 3: 30–43. https://doi.org/10.1242/jcs.s1-3.9.30
  19. Heiden, H. & Kolbe, R.W. (1928) Die Marinen Diatomeen der Deutschen Südpolar-Expedition, 1901–1903. In: Deutsche Sudpolar-Expedition, 1901-1903, herausgegeben von Erich von Drygalski. Vol. VIII, Botanik (no. 5). Walter de Gruyter & Co., Berlin und Leipzig, pp. 447–715, pls. 31–43. https://doi.org/10.5962/bhl.title.39693
  20. Hustedt, F. (1927) Die Kieselalgen Deutschlands, Österreichs und der Schweiz unter Berücksichtigung der übrigen Länder Europas sowie der angrenzenden Meeresgebiete. Bd. VII: Teil 1: Liefrung 1. In: Anonymous (Eds.) Rabenhorst's Kryptogamen Flora von Deutschland, Österreich und der Schweiz. Akademische Verlagsgesellschaft m.b.h., Leipzig, 272 pp. https://doi.org/10.5962/bhl.title.100894
  21. Kalitina, E.G., Nikulina, T.V., Kharitonova, N.A. & Vakh, E.A. (2015) Materials for the study of microbial diversity in thermal springs in Kamchatka, Russia. In: Proceedings of the Russian Conference with International Participation "Modern Problems of Hydrogeology, Engineering Geology, and Hydrogeoecology of Eurasia" with Elements of a Scientific School. Tomsk Polytechnic University, Tomsk, pp. 510–513. [In Russian]
  22. 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
  23. Kharitonov, V.G. & Genkal, S.I. (2012) Diatoms of the Elgygytgyn Lake and its vicinities (Chukotka). SVNTs DVO RAN, Magadan, 402 pp.
  24. Kociolek, J.P., Hamsher, S.E., Kulikovskiy, M. & Bramburger, A.J. (2017) Are there species flocks in freshwater diatoms? A review of past reports and a look to the future. Hydrobiologia 792 (1): 17–35. https://doi.org/10.1007/s10750-016-3075-1
  25. Krammer, K. & Lange-Bertalot, H. (1991) Süßwasserflora von Mitteleuropa. Bacillariophyceae: Achnanthaceae. Kritische Ergänzungen zu Navicula (Lineolatae) und Gomphonema. Vol. 2/4. Gustav Fischer Verlag, Jena, 437 pp. https://doi.org/10.1016/0304-3770(93)90059-6
  26. Krammer, K. & Lange-Bertalot, H. (2004) Bacillariophyceae 4. Teil: Achnanthaceae, Kritische Ergänzungen zu Achnanthes s. l., Navicula s. str., Gomphonema. Gesamtliteraturverzeichnis Teil 1–4. Ergänzter Nachdruck. Süßwasserflora von Mitteleuropa, Bd. 2/4. Spektrum Akademischer Verlag, Heidelberg, 468 pp. https://doi.org/10.1016/0304-3770(93)90059-6
  27. Kulikovskiy, M.S., Lange-Bertalot, H., Metzeltin, D. & Witkowski, A. (2012) Lake Baikal: Hotspot of endemic diatoms I. Iconographia Diatomologica 23: 1–861.
  28. Kulikovskiy, M., Maltsev, Y., Glushchenko, A., Kuznetsova, I., Kapustin, D., Gusev, E., Lange-Bertalot, H., Genkal, S. & Kociolek, J.P. (2020a) 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
  29. Kulikovskiy, M.S., Lange-Bertalot, H. & Kuznetsova, I.V. (2015) Lake Baikal: hotspot of endemic diatoms II. Iconographia Diatomologica 26: 1–657.
  30. Kulikovskiy, M., Glushchenko, A., Kuznetsova, I., Genkal, S. & Kociolek, J.P. (2020c) 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
  31. 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): 58–67. https://doi.org/10.5507/fot.2019.014
  32. Kützing, F.T. (1844) Die Kieselschaligen Bacillarien oder Diatomeen. zu finden bei W. Köhne, Nordhausen, 152 pp. https://doi.org/10.5962/bhl.title.64360
  33. Kützing, F.T. (1846) Kurze Mittheilung über einige kieselschalige Diatomeen. Botanische Zeitung 4 (14): 247–249.
  34. Lange-Bertalot, H. (1999) Neue Kombinationen von Taxa aus Achnanthes Bory (sensu lato). Iconographia Diatomologica 6: 276–289.
  35. Lange-Bertalot, H. & Krammer, K. (1989) Achnanthes. Eine Monographie der Gattung mit Definition der Gattung Cocconeis und Nachträgen zu den Naviculaceae. Bibliotheca Diatomologica 18: 1–393. https://doi.org/10.1016/s0003-9365(97)80045-0
  36. Lepskaya, E. (2007) Phytoplankton of the lake Palanskoye: taxonomy, ecology, dynamics of quantitative characteristics. Research of water biological resources of Kamchatka and of the northwest part of Pacific Ocean 9: 10–20. [In Russian]
  37. Lepskaya, E.V., Chernomorova, A.A., Shaginyan, A.E. & Shubkin, S.V. (2011) Micro alga in the plankton of Nachikinskoye Lake (South Kamchatka). In: Materials of XII International Scientific Conference "Conservation of biodiversity of Kamchatka and adjacent seas", dedicated to the 300th anniversary of the birth of S.P. Krasheninnikov (Petropavlovsk-Kamchatsky, 14–15 December 2011). Kamchatpress, Petropavlovsk-Kamchatsky, pp. 62–65. [In Russian] https://doi.org/10.25221/levanidov.09.10
  38. Lepskaya, E.V., Lupikina, E.G., Maslov, A.V., Ukolova, T.K. & Sviridenko, V.D. (2003) For pelagic algoflora characteristic of some Kamchatka lakes. Vladimir Ya. Levanidov's Biennial Memorial Meetings 2: 272–286. [In Russian]
  39. Lepskaya, E.V., Lupikina, E.G., Milovskaya, L.V., Sirotenko, I.N. & Sviridenko, V.D. (1998) Phytoplankton of Lake Palanskoe (Kamchatka) as an indicator of the state of its ecosystem. Research of the biology and dynamics of the number of commercial fishes of the Kamchatka shelf 4: 176–181. [In Russian]
  40. Markevich, G.N., Lepskaya, E.V., Isaev, V.A., Bonk, T.V., Sviridenko, V.D., Chebanova, V.V., Genkal, S.I. & Vvedenskaya, T.L. (2011) Natural environments, microflora and fauna in the lakes upstream of the Avacha River (Kamchatka). Izvestiya TINRO 164: 312–329. [In Russian]
  41. Metzeltin, D. & Lange-Bertalot, H. (1998) Tropical diatoms of South America I: About 700 predominantly rarely known or new taxa representative of the neotropical flora. Iconographia Diatomologica 5: 1–695.
  42. 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
  43. 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] https://doi.org/10.25221/levanidov.11.13
  44. Nikulina, T.V. & Kociolek, J.P. (2011) Diatoms from hot springs from Kuril and Sakhalin Islands (Far East, Russia). In: Seckbach, J. & Kociolek, J.P. (Eds.) The Diatom World. Springer, Dordrecht, pp. 333–363. https://doi.org/10.1007/978-94-007-1327-7_15
  45. 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
  46. Nikulina, T.V., Kalitina, E.G., Kharitonova, N.A., Chelnokov, G.A., Vakh, E.A. & Grishchenko, O.V. (2019) Diatoms from hot springs of the Kamchatka Peninsula (Russia). In: Seckbach, J. & Gordon, R. (Eds.) Diatoms: Fundamentals and Applications. Scrivener Publishing LLC, Beverly, pp. 311–333. https://doi.org/10.1002/9781119370741.ch14
  47. 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] https://doi.org/10.1002/9781119370741.ch14
  48. Østrup, E. (1910) Danske Diatoméer med 5 tavler et Engelsk résumé. Udgivet paa Carlsbergfondets bekostning. C.A. Reitzel Boghandel Bianco Lunos Bogtrykkeri, Kjøbenhavn [Copenhagen], 323 pp.
  49. Patrick, R.M. & Reimer, C.W. (1966) The Diatoms of the United States exclusive of Alaska and Hawaii. Volume 1. Fragilariaceae, Eunotoniaceae, Achnanthaceae, Naviculaceae. Monographs of the Academy of Natural Sciences of Philadelphia 13: 1–688. https://doi.org/10.1126/science.153.3742.1369
  50. Potapova, M. (2014) Diatoms of Bering Island, Kamchatka, Russia. Nova Hedwigia Beiheft 143: 63–102.
  51. Potapova, M. (2015) Planothidium lanceolatoides. Available from: https://diatoms.org/species/50373/planothidium_lanceolatoides (accessed 19 February 2026)
  52. Potapova, M. & Leppik, S. (2026) Diatoms of the Alaskan Arctic Coastal Plain prior to recent climate change: a reexamination of Leonard Freese's collections. Proceedings of the Academy of Natural Sciences of Philadelphia 169 (1): 125–184. https://doi.org/10.1635/053.169.0110
  53. Schaarschmidt, J. (1881) Specimen phycologiae aequatoriensis. Magyar Novenytani Lapok 5 (50): 17–24.
  54. Riaux-Gobin, C., Witkowski, A., Igersheim, A., Lobban, C.S., Al-Handal, A.Y. & Compère, P. (2018) Planothidium juandenovense sp. nov. (Bacillariophyta) from Juan de Nova (Scattered Islands, Mozambique Channel) and other tropical environments: A new addition to the Planothidium delicatulum complex. Fottea 18 (1): 106–119. https://doi.org/10.5507/fot.2017.019
  55. Round, F.E. & Bukhtiyarova, L. (1996) Four new genera based on Achnanthes (Achnanthidium) together with a re-definition of Achnanthidium. Diatom Research 11 (2): 345–361. https://doi.org/10.1080/0269249X.1996.9705389
  56. Schmidt, A. (1893) Atlas der Diatomaceen-kunde. Series IV (Heft 48). O.R. Reisland, Leipzig, pls. 189–192.
  57. 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]
  58. Simonsen, R. (1992) The diatom types of Heinrich Heiden in Heiden & Kolbe 1928. Bibliotheca Diatomologica 24: 1–229.
  59. Smith, W. Rev. (1855) Notes of an excursion to the south of France and the Auvergne in search of Diatomaceae. Annals and Magazine of Natural History Series 2 15: 1–9. https://doi.org/10.1080/037454809495381
  60. Sovereign, H.E. (1958) The diatoms of Crater Lake, Oregon. Transactions of the American Microscopical Society 77 (2): 96–134. https://doi.org/10.2307/3224112
  61. Tseplik, N. & Chudaev, D. (2020) Freshwater achnanthoid diatoms (Bacillariophyta) of the southern part of the Murmansk Region. Novosti sistematiki nizshikh rastenii 54 (1): 43–65. https://doi.org/10.31111/nsnr/2020.54.1.43
  62. 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
  63. 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
  64. Tseplik, N., Maltsev, Y., Glushchenko, A., Genkal, S. & Kulikovskiy, M. (2025) 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
  65. Van de Vijver, B., Frenot, Y. & Beyens, L. (2002) Freshwater diatoms from Ile de la Possession (Crozet Archipelago, Subantarctica). Bibliotheca Diatomologica 46: 1–412. https://doi.org/10.1007/s003000050408
  66. Van de Vijver, B., Wetzel, C.E. & Ector, L. (2018) Analysis of the type material of Planothidium delicatulum (Bacillariophyta) with the description of two new Planothidium species from the sub-Antarctic Region. Fottea 18 (2): 200–211. https://doi.org/10.5507/fot.2018.006
  67. Van Heurck, H. (1880) Synopsis des Diatomées de Belgique. Atlas. Ducaju & Cie., Anvers, 61 pp.

How to Cite

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