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Type: Article
Published: 2023-12-07
Page range: 223-234
Abstract views: 71
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Aulacoseira huguang sp. nov., a new Lateglacial fossil diatom from South China

Key Laboratory of Cenozoic Geology and Environment; Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing; China. College of Earth and Planetary Sciences; University of Chinese Academy of Sciences; Beijing; China.
Key Laboratory of Cenozoic Geology and Environment; Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing; China. CAS Center for Excellence in Life and Paleoenvironment; Beijing; China.
Key Laboratory of Cenozoic Geology and Environment; Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing; China. College of Earth and Planetary Sciences; University of Chinese Academy of Sciences; Beijing; China.
School of Earth Sciences and Resources; China University of Geosciences; Beijing; China.
Key Laboratory of Cenozoic Geology and Environment; Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing; China.
Centric diatom Aulacoseira fossil species taxonomy Huguangyan maar lake China Algae


Examination of a sediment sequence from Huguangyan Maar Lake (HML) in southeast China revealed the presence of a new Aulacoseira species in samples dated to the Lateglacial. Using light microscopy (LM) and scanning electron microscopy (SEM), this small-sized species is described as Aulacoseira huguang sp. nov. Its morphology is compared with those of similar species, such as A. subborealis (Nygaard) Denys, Muylaert & Krammer, A. pusilla (F. Meister) Tuji & Houki, A. stevensiae Weide, A. subarctica (O. Müller.) Haworth, A. scalaris (Grunow in Van Heurck) Houk, Klee & Passauer, A. distans (Ehrenberg) Simonsen and A. alpigena (Grunow) Krammer. Aulacoseira huguang sp. nov. can be differentiated by the following combination of characters: valve face covered in round areolae evenly spaced, a smooth collum, small cell size, the presence of two rimoportulae located on the ringleist, positioned in opposite places on the perimeter of the valve and spines that are separated from the first row of areolae.



  1. Battarbee, R.W., Jones, V.J., Flower, B.P., Cameron, N.G., Bennion, C.H.L. & Juggins, S. (2001) Diatoms. In: Smol, J.P., Birk, H.J.B. & Last, W.M. (Eds.) Tracking Environmental Change Using Lake Sediments. Kluwer Academic Publishers, Dordrecht, pp. 155–201.
  2. Bedoshvili, Y., Bondarenko, N., Sakirko, M., Khanaev, I. & Likhoshvay, E. (2007) The change in the length of colonies of the planktonic diatom Aulacoseira baicalensis in various stages of the annual cycle in Lake Baikal. Hydrobiological Journal 43: 79–86.
  3. Bicudo, D.C., Tremarin, P.I., Almeida, P.D., Zorzal-Almeida, S., Wengrat, S., Faustino, S.B., Costa, L.F., Bartozek, E.C.R., Rocha, A.C.R., Bicudo, C.E.M. & Morales, E.A. (2016) Ecology and distribution of Aulacoseira species (Bacillariophyta) in tropical reservoirs from Brazil. Diatom Research 31 (3): 199–215.
  4. Crawford, R.M. & Likhoshway, Y. (1999) The frustule structure of original material of Aulacoseira distans (Ehrenberg) Simonsen. Diatom Research 14 (2): 239–250.
  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. Davey, M.C. (1987) Seasonal variation in the filament morphology of the freshwater diatom Melosira granulata (Ehrenb.) Ralfs. Freshwater Biology 18 (1): 5–16.
  7. Denys, L., Muylaert, K., Krammer, K., Joosten, T., Reid, M. & Rioual, P. (2003) Aulacoseira subborealis stat. nov. (Bacillariophyceae): a common but neglected plankton diatom. Nova Hedwigia 77 (3–4): 407–427.
  8. Gibson, C.E., Anderson, N.J. & Haworth, E.Y. (2003) Aulacoseira subarctica: taxonomy, physiology, ecology and palaeoecology. European Journal of Phycology 38 (2): 83–101.
  9. Haworth, E.Y. (1988) Distribution of diatom taxa of the old genus Melosira (now mainly Aulacoseira) in Cumbrian waters. In: Round, F.E. (ed.) Algae and the aquatic environment. Biopress, Bristol, pp. 138–167.
  10. Haworth, E.Y. (1990) Diatom name validation. Diatom Research 5 (1): 195–196.
  11. Heudre, D., Moreau, L., Wetzel, C.E. & Ector, L. (2015) Discovery of living populations of a purported fossil diatom: Aulacoseira scalaris from two lakes in the Vosges Mountains (France). Cryptogamie, Algologie 36 (3): 357–368.
  12. Hohn, M.H. & Hellerman, J. (1963) The taxonomy and structure of diatom populations from three eastern North American rivers using three sampling methods. Transactions of the American Microscopical Society 82 (3): 250–329, 6 pls.
  13. Horn, H., Paul, L., Horn, W. & Petzoldt, T. (2011) Long-term trends in the diatom composition of the spring bloom of a German reservoir: is Aulacoseira subarctica favoured by warm winters? Freshwater Biology 56 (12): 2483–2499.
  14. Hötzel, G. & Croome, R. (1996) Population dynamics of Aulacoseira granulata (Ehr.) Simonsen (Bacillariophyceae, Centrales), the dominant alga in the Murray River, Australia. Archiv für Hydrobiologie 136 (2): 191–215.
  15. Houk, V. (2003) Atlas of freshwater centric diatoms with a briefkey and descriptions. Part. I. Melosiraceae, Orthoseiraceae, Paraliaceae and Aulacoseiraceae. Czech Phycology Supplement 1: 1–27.
  16. Houk, V. & Klee, R. (2007) Atlas of freshwater centric diatoms with a brief key and descriptions Part II. Melosiraceae and Aulacoseiraceae (Supplement to Part I). Fottea 7: 58–255.
  17. Houk, V. & Klee, R. (2004) The stelligeroid taxa of the genus Cyclotella (Kützing) Brébisson (Bacillariophyceae) and their transfer into the new genus Discostella gen. nov. Diatom Research 19 (2): 203–228. 1080/0269249x.2004.9705871
  18. Houk, V., Klee, R. & Passauer, U. (2007) Observations on taxa of Melosira sensu lato among the slides from the Grunow diatom collection in Vienna (Austria). Part 1. Diatom Research 22 (1): 57–80.
  19. Hu, C., Guo, K., Wu, N., Liu, Q., Liu, Q., Yang, W. & Wang, C. (2023) How do multidimensional traits of dominant diatom Aulacoseira respond to abiotic and biotic factors in a river delta system? Journal of Environmental Management 327: 116858.
  20. Huang, C., Liu, S., Cheng, Z. & Mao, Y. (1995) Atlas of limnetic fossil diatoms of China. Beijing, China Ocean Press. [In Chinese]
  21. Jewson, D.H. & Granin, N.G. (2014) Cyclical size change and population dynamics of a planktonic diatom, Aulacoseira baicalensis, in Lake Baikal. European Journal of Phycology 50 (1): 1–19. 09670262.2014.979450
  22. Kociolek, J.P., You, Q., Liu, Q., Liu, Y. & Wang, Q. (2020) Continental diatom biodiversity discovery and description in China: 1848 through 2019. PhytoKeys 160: 45–97.
  23. Krammer, K. (1991) Morphology and taxonomy of some taxa in the genus Aulacoseira Thwaites (Bacillariophyceae). I. Aulacoseira distans and similar taxa. Nova Hedwigia 52 (1/2): 89–112.
  24. Krammer, K. (1997) Die cymbelloiden Diatomeen. Eine Monographie der weltweit bekannten Taxa. Teil 1. Allgemeines und Encyonema Part. Bibliotheca Diatomologica 36: [i–iii] [1]–382.
  25. Manoylov, K.M., Ognjanova-Rumenova, N. & Stevenson, R.J. (2009) Morphotype variations in subfossil diatom species of Aulacoseira in 24 Michigan Lakes, USA. Acta Botanica Croatica 68 (2): 401–419.
  26. Medlin, L.K. & Kaczmarska, I. (2004) Evolution of the Diatoms: V. Morphological and Cytological Support for the Major Clades and a Taxonomic Revision. Phycologia 43: 245–270.
  27. O’Farrell, I., Tell, G. & Podlejski, A. (2001) Morphological variability of Aulacoseira granulata (Ehr.) Simonsen (Bacillariophyceae) in the Lower Paraná River (Argentina). Limnology 2 (2): 65–71.
  28. Poister, D., Kurth, A., Farrell, A. & Gray, S. (2012) Seasonality of Aulacoseira ambigua abundance and filament length: biogeochemical implications. Plankton and Benthos Research 7 (2): 55–63.
  29. Potapova, M. (2009) Aulacoseira alpigena. In: Diatoms of North America. Available from: (accessed: 25 June 2023).
  30. Potapova, M. (2010) Aulacoseira pusilla. In: Diatoms of North America. Available from: (accessed: 18 November 2022).
  31. Potapova, M.G., Bixby, R.J., Charles, D.F., Edlund, M.B., Enache, M.E., Furey, P., Hamilton, P.B., Lowe, R.L., Manoylov, K.M., Ognjanova-Rumenova, N., Ponader, K.C., Ren, L., Siver, P.A., Spaulding, S.A. & Zalack, J. (2008) Eighteenth NAWQA workshop on harmonization of algal taxonomy – Representatives of the genus Aulacoseira Thwaites in NAWQA samples. Report No. 08-07. The Academy of Natural Sciences of Philadelphia 56.
  32. Rasband, W.S. (2013) ImageJ, version 1.46r. U. S. National Institutes of Health, Bethesda, Maryland, U.S.A. Available from: (accessed: 19 October 2023).
  33. Round, F.E., Crawford, R.M. & Mann, D.G. (1990) The Diatoms. Biology and Morphology of the Genera. Cambridge University Press, Cambridge, 747 pp.
  34. Simonsen, R. (1979) The diatom system: ideas on phylogeny. Bacillaria 2: 9–71.
  35. Siver, P.A. & Kling, H. (1997) Morphological observations of Aulacoseira using scanning electron microscopy. Canadian Journal of Botany 75 (11): 1807–1835.
  36. Sterrenburg, F.A.S., Hamilton, P. & Williams, D. (2012) Universal ccordinate method for locating light-microscope specimen. Diatom Research 27: 91–94.
  37. Thwaites, G.H.K. (1848) Further observations on the Diatomaceae with descriptions of new genera and species. Annals and Magazine of Natural History, Series 21: 161–172.
  38. Tuji, A. & Houki, A. (2004) Taxonomy, ultrastructure, and biogeography of the Aulacoseira subarctica species complex. Bulletin of National Science Museum 30 (2): 35–55.
  39. Tuji, A. & Williams, D.M. (2006) Type examination of the freshwater centric diatom Aulacoseira pusilla (F. Meister) Tuji et Houki. Diatom 22: 70–73. [in Japanese with English abstract]
  40. Turkia, J. (1999) Size variations of planktonic Aulacoseira Thwaites (Diatomae) in water and in sediment from Finnish lakes of varying trophic state. Journal of Plankton Research 21 (4): 757–770. plankt/21.4.757
  41. Van Dam, H. & Kooyman, H. (1982) A new diatom from Dutch moorland pools: Navicula heimansii (Bacillariophyceae). Acta Botanica Neerlandica 31 (1/2): 1–4. 588.x
  42. Wang, C., Li, X., Lai, Z., Tan, X., Pang, S. & Yang, W. (2009) Seasonal variations of Aulacoseira granulata population abundance in the Pearl River Estuary. Estuarine, Coastal and Shelf Science 85 (4): 585–592.
  43. Wang, C., Lek, S., Lai, Z. & Tudesque, L. (2017) Morphology of Aulacoseira filaments as indicator of the aquatic environment in a large subtropical river: the Pearl River, China. Ecological Indicators 81: 325–332.
  44. Wang, C., Wu, N., Li, W., Liu, Q., Lai, Z. & Fohrer, N. (2020) Curved filaments of Aulacoseira complex as ecological indicators in the Pearl River, China. Ecological Indicators 118: 106722.
  45. Wang, L., Hao, Q., Zhang, D., Zou, Y., Rioual, P., Zhang, E., Li, J., Luo, H., Li, J., Chu, G. & Gu, Z. (2022) Meltwater Pulse1A Triggered an Extreme Cooling Event: Evidence From Southern China. Paleoceanography and Paleoclimatology 37 (12): e2022PA004426.
  46. Wang, L., Li, J., Lu, H., Gu, Z., Rioual, P., Hao, Q., Mackay, A.W., Jiang, W., Cai, B., Xu, B., Han, J. & Chu, G. (2012) The East Asian winter monsoon over the last 15,000 years: its links to high-latitudes and tropical climate systems and complex correlation to the summer monsoon. Quaternary Science Reviews 32: 131–142.
  47. Wang, L., Lu, H., Liu, J., Gu, Z.N., Mingram, J., Chu, G., Li, J., Rioual, P., Negendank, J.F.W., Han, J. & Liu, T. (2008) Diatom-based inference of variations in the strength of Asian winter monsoon winds between 17,500 and 6000 calendar years B.P. Journal of Geophysical Research 113 (D21).
  48. Weide, D.M. (2015) Aulacoseira stevensiae sp. nov. (Coscinodiscophyceae, Bacillariophyta), a new diatom from Ho Ba Bê, Bac Kan Province, Northern Viêt Nam. Diatom Research 30 (3): 263–268.
  49. Yang, J.R., Stoermer, E.F. & Kociolek, J.P. (1994) Aulacoseira dianchiensis sp. nov., a new fossil diatom from China. Diatom Research 9 (1): 225–231.
  50. Zhu, H. & Chen, J. (2000) Bacillariophyta of the Zizang Plateau. Beijing China: Science Press, 353 pp. [In Chinese]