Nitzschia imae sp. nov. (Bacillariophyta, Nitzschiaceae) from Iceland, with a redescription of Hannaea arcus var. linearis


  • Irene Álvarez-Blanco Department of Biodiversity and Environmental Management, University of León
  • Saúl Blanco Department of Biodiversity and Environmental Management, University of León



diatoms, new taxon, new combination, Nitzschia, Hannaea, Iceland, geothermal lake


From field-collected samples, two Icelandic diatom species were studied under light and electron microscopy, resulting in a newly described species and an emended description with a nomenclatural status change. A discussion on the morphological features of these taxa and their taxonomic affinities with related species is presented. Nitzschia imae is described from Blue Lagoon, south-west Iceland. The main diagnostic criteria include the presence of two differences morphotypes, one with obtusely rounded apices and the other with slightly asymmetrical valve outline and broadly rounded apices. Additionally, we propose an emended description for Hannaea arcus var. linearis since there is no concordance between morphometric features in the protologue and the type illustration.


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Atlas, R.M. & Bartha, R. 1993. Microbial ecology. Fundamentals and applications. 3rd edition. Benjamin/Cummings. Menlo Park. PMCid:PMC182248

Behre, K. & Schwabe, G.H. 1970. Auf surtsey, island im sommer 1968 nachgewiesene nicht marine algen. Ueber die natu.rliche fru.hbesiedlung vulkanischer substrate oberhalb des litorals. Schriften Natturwiss Vereins Schleswig-Holstein 1970: 31-100.

Bixby, R.J. 2001. Morphology, phytogeography, and systematics of the diatom genus Hannaea (Bacillariophyceae). Ph.D. dissertation. University of Michigan. Ann Arbor.

Bixby, R.J., Edlund, M.B. & Stoermer, E.F. 2005. Hannaea superiorensis sp. nov., an endemic diatom from the Laurentian Great Lakes. Diatom research 20: 227-240.

Bixby, R.J. & Jahn, R. 2005. Hannaea arcus (Ehrenberg) R.M. Patrick: lectotypification and nomenclatural history. Diatom Research 20: 210-226.

Blanco, S., Álvarez, I. & Cejudo, C. 2008. A test on different aspects of diatom processing techniques. Journal of Applied Phycology 20: 445-450. Ector, L. & Hlúbiková, D. 2010. Atlas des diatomées des AlpesMaritimes et de la Région Provence-Alpes-Côte d'Azur. Centre de Recherche Public-Gabriel Lippmann. Belvaux.

Ehrenberg, C.G. 1838. Die lnfusionsthierchen als vollkommende Organismen. Ein Blick in das tiefere organische Leben der Natur. Leopold Voss. Leipzig.

Foged, N. 1974. Freshwater diatoms in Iceland. Bibliotheca Phycologica 15: 3-118.

Foged, N. 1981. Diatoms in Alaska. Bibliotheca Phycologica 53: 1-317.

Germain, H. 1981. Flore des Diatomées. Diatomophycées d'Eaux douces et Saumâtres. Boubée. Paris.

Grether Beck, S., Mu.hlberg, K., Brenden, H., Felsner, I., Brynjolfsdottir, A., Einarsson, S. & Krutmann, J. 2008. Bioactive molecules from the Blue Lagoon: in vitro and in vivo assessment of silica mud and microalgae extracts for their effects on skin barrier function and prevention of skin ageing. Experimental Dermatology 17: 771-779. PMid:18312388

Hansen, C. 1872. Et lille Bidrag til Kundskaben om de danske Bilandes Diatomée-Flora. Vidensk Meddelelser fra Nalurhist Forening. København.

Hofmann, G., Werum, M. & Lange-Bertalot, H. 2011. Diatomeen im Süsswasser-Benthos von Mitteleuropa. Bestimmungsflora Kieselalgen fu.r die ökologische Praxis. Über 700 der häufigsten Arten und ihre Ökologie. A.R.G. Gantner Verlag K.G. Rugell.

Holmboe, J. 1899. Undersøgelser over norske ferskvandsdiatoméer. I. Diatoméer fra indsjøer i det sydlige Norge. Archiv for Mathematik og Naturvidenskabelig, Christiania 22(1, 1): 1-72.

Hustedt, F. 1949. Süsswasser-Diatomeen aus dem Albert-Nationalpark in Belgisch-Kongo. Exploration du Parc National Albert, Mission H. Damas (1935-1936), Institut des Parcs Nationaux du Congo Belge 8: 1-199.

Hustedt, F. 1962 Die Kieselalgen Deutschlands, Österreichs und der Schweiz unter Berücksichtigung der u.brigen Länder Europas sowie der angrenzenden Meeresgebiete. In: Rabenhorst, L. (ed.), Kryptogamen Flora von Deutschland, Österreich und der Schweiz: 161-348. Akademische Verlagsgesellschaft m.b.h. Leipzig.

Jiang, H., Seidenkrantz, M.S., Knudsen, K.L. & Eiríksson, J. 2001. Diatom surface sediment assemblages around Iceland and their relationships to oceanic environmental variables. Marine Micropaleontology 41(1): 73-96.

Jiang, H., Seidenkrantz, M.S., Knudsen, K.L. & Eiríksson, J. 2002. Late-Holocene summer sea-surface temperatures based on a diatom record from the north Icelandic shelf. The Holocene 12(2): 137-147.

Karpuz, N. K. & Schrader, H. 1990. Surface sediment diatom distribution and Holocene paleotemperature variations in the Greenland, Iceland and Norwegian Sea. Paleoceanography 5(4): 557-580.

Kazandjieva, J., Grozdev, I., Darlenski, R. & Tsankov, N. 2008. Climatotherapy of psoriasis. Clinics in Dermatology 26(5): 477-485. PMid:18755366

Koç, N., Jansen, E. & Haflidason, H. 1993. Paleoceanographic reconstructions of surface ocean conditions in the Greenland, Iceland and Norwegian seas through the last 14 ka based on diatoms. Quaternary Science Reviews 12(2): 115-140.

Knudsen, K.L., Eiríksson, J., Jiang, H. & Jónsdóttir, I. 2009. Palaeoceanography and climate changes off North Iceland during the last millennium: comparison of foraminifera, diatoms and ice rafted debris with instrumental and documentary data. Journal of Quaternary Science 24(5): 457-468.

Kociolek, J.P. & Herbst, D.B. 1992. Taxonomy and distribution of benthic diatoms from Mono Lake, California, U.S.A. Transactions of the American Microscopical Society 111(4): 338-355.

Krammer, K. & Lange-Bertalot, H. 1988. Die Su.sswasserflora von Mitteleuropa 2: Bacillariophyceae. 2 Teil: Bacillariaceae, Epithemiaceae, Surrielaceae. Gustav Fischer-Verlag. Stuttgart. PMCid:PMC334699

Matz, H., Orion, E. & Wolf, R. 2003. Balneotherapy in dermatology. Dermatologic Therapy 16: 132-140. PMid:12919115

Ólafsson, J.H., Sigurgeirsson, B. & Pálsdóttir, R. 1996. Psoriasis treatment: bathing in a thermal lagoon combined with UVB, versus UVB treatment only. Acta Dermatovenereologica-Stockholm 76: 228-230.

Ostenfeld, C.H. 1904. Studies on Phytoplankton II. A sample from a Lake in Iceland. Botanisk Tidsskrift 26(2): 231-236.

Østrup, E. 1918. Fresh-water Diatoms from Iceland. Part I. The Botany of Iceland II 1(1): 1-98.

Owen, R.B., Renaut, R.W. & Jones, B. 2008. Geothermal diatoms: a comparative study of floras in hot spring systems of Iceland, New Zealand, and Kenya. Hydrobiologia 610: 175-192.

Petersen, J.B. 1928a. The aërial Algae of Iceland. The Botany of Iceland II 2(8): 325-447.

Petersen, J.B. 1928b. Algefloraen i nogle Jordprover fra Island. Dansk Botanisk Arkiv 5(9): 1-23.

Petersen, J.B. 1935. On some Algae from Grimsey. Botanisk Tidsskrift 43(4): 269-277.

Pétursdóttir, S.K. & Kristjánsson, J.K. 1996. The relationship between physical and chemical conditions and low microbial diversity in the Blue Lagoon geothermal lake in Iceland. FEMS Microbiology Ecology 19: 39-45.

Pétursdóttir, S.K. & Kristjánsson, J.K. 1997. Silicibacter lacuscaerulensis gen. nov., sp. nov., a mesophilic moderately halophilic bacterium characteristic of the Blue Lagoon geothermal lake in Iceland. Extremophiles 1(2): 94-99. PMid:9680308

Pétursdóttir, S.K., Bjornsdottir, S.H., Hreggvidsson, G.O., Hjorleifsdottir, S. & Kristjánsson, J.K. 2009. Analysis of the unique geothermal microbial ecosystem of the Blue Lagoon. FEMS Microbiology Ecology 70(3): 425-432. PMid:19709176

Potapova, M. 1996. Epilithic algal communities in rivers of the Kolyma Mountains, NE Siberia, Russia. Nova Hedwigia 63: 309-334.

Ran, L., Jiang, H., Knudsen, K.L. & Eiríksson, J. 2011. Diatom-based reconstruction of palaeoceanographic changes on the North Icelandic shelf during the last millennium. Palaeogeography, Palaeoclimatology, Palaeoecology 302(1): 109-119.

Scher, O., Defaye, D., Korovchinsky, N.M. & Thiéry, A. 2000. The crustacean fauna (Branchiopoda, Copepoda) of shallow freshwater bodies in Iceland. Vestnik Zoologii 34: 11-25.

Schrader, H. & Karpuz, N.K. 1990. Norwegian–Iceland Seas: Transfer Functions between Marine Planktic Diatoms and Surface Water Temperature. In: Bleil, U. & Thiede, J. (eds.), Geological History of the Polar Oceans: Arctic Versus Antarctic: 337-361. Kluwer Academic Publishers. Amsterdam.

Suryata, I., Svavarsson, H.G., Einarsson, S., Brynjólfsdóttir, Á. & Maliga, G. 2010. Geothermal CO2 bio-mitigation techniques by utilizing microalgae at the Blue Lagoon, Iceland. Proceedings, 34th Workshop on Geothermal Reservoir Engineering. Stanford University, Stanford.

Van der Werff, A. 1941. Scientific Results of Prof. Dr. van Oye's Expedition in Iceland. XI: Bacillariales. Biologisch Jaarboek uitgegeven door het Koninklijk Natuurweten - schappelijk Genootschap Dodonaea te Gent 8: 77-134.

Van Heurck, H. 1880-1881. Synopsis des Diatomees de Belgique. Edité par L'auteur. Anvers.

Witkowski, A., Lange-Bertalot, H. & Metzeltin, D. 2000. Diatom Flora of Marine Coasts I. Iconographia Diatomologica 7: 1-925.




How to Cite

Álvarez-Blanco, I., & Blanco, S. (2013). Nitzschia imae sp. nov. (Bacillariophyta, Nitzschiaceae) from Iceland, with a redescription of Hannaea arcus var. linearis. Anales Del Jardín Botánico De Madrid, 70(2), 144–151.