Abstract
A new species of the diatom genus Luticola D.G.Mann is described from a wet meadow environment from Gunnison County, Colorado, based on light and scanning electron microscopy. The new species has rugose valves, with longitudinal interruptions in the striae. Unlike other species of the genus, L. coloradiana sp. nov. has a simple structure of the internal stigma, lacking the complex opening seen in all other species in the genus. The new species resembles L. plausibilis (Hustedt) D.G.Mann, described from Franz Josef Land in the Arctic, but differs in valve shape and density of the striae. Luticola coloradiana sp. nov. also resembles L. plausibiloides Metzeltin et al., a species described from subtropical Uruguay, but differs in striae density and the rugose nature of the valves. Further research is needed to assess if the similar species from the Arctic and subtropical South America also possess the unique stigma structure seen in L. coloradiana sp. nov.
References
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B?k, M., Kryk, A., Peszek, ?., Kociolek, J.P., Bemiasa, J. & Bemanaja, E. (2019) New and interesting Luticola species (Bacillariophyta) from the mangroves of Nosy Be Island, NW Madagascar. Oceanological and Hydrobiological Studies 48: 13–22. https://doi.org/10.1515/ohs-2019-0002
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Bock, W. (1970) Felsen und mauern als diatomeenstandorte. In: Gerloff, J. & Cholnoky, J.B. (eds.) Diatomaceae II. Beihefte zur Nova Hedwigia 31: 395–441. https://doi.org/10.1127/nova.beihefte/31/1970/395
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Cleve, P.T. (1894) Synopsis of the naviculoid diatoms, Part 1. Kongelige Svenska Vetenskaps-Akademiens Handlingar 26: 1–194.
Das, S.K., Rawat, D.S., Dash, S.S., Banerjee, A., Sinha, B.K. & Singh, P. (2020) Moss-inhabiting diatoms as ecological indicators in Neora Valley National Park (Eastern Himalaya), India. Tropical Ecology 61: 226–237. https://doi.org/10.1007/s42965-020-00083-9
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Johansen, J.R. & Rushforth, S.R. (1981) Diatoms of surface waters and soils of selected oil shale lease areas of Eastern Utah. Nova Hedwigia 34: 333–390.
Johansen, J.R., Rushforth, S.R., Orbendorfer, R., Fungladda, N. & Grimes, J.A. (1983) The algal flora of selected wet walls in Zion National Park, USA. Nova Hedwigia 38: 765–810.
Kociolek, J.P., Balasubramanian, K., Blanco, S., Coste, M., Ector, L., Liu, Y., Kulikovskiy, M., Lundholm, N., Ludwig, T., Potapova, M., Rimet, F., Sabbe, K., Sala, S., Sar, E., Taylor, J., Van de Vijver, B., Wetzel, C.E., Williams, D.M., Witkowski, A. & Witkowski, J. (2022) DiatomBase. Accessed at: http://www.diatombase.org (accessed 13 July 2022)
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Kopalová, K., Nedbalová, L., De Haan, M. & Van De Vijver, B. (2011) Description of five new species of the diatom genus Luticola (Bacillariophyta, Diadesmidaceae) found in lakes of James Ross Island (Maritime Antarctic Region). Phytotaxa 27 (1): 44–60. https://doi.org/10.11646/phytotaxa.27.1.5
Levkov, Z., Metzeltin, D. & Pavlov, A. (2013) Luticola and Luticopsis. Diatoms of Europe 7: 1–698.
Lokhande, V., Radhakrishnan, C., Kociolek, J.P., Lowe, R.L. & Karthick, B. (2020) The diatom genus Luticola D.G. Mann (Bacillariophyceae) in the Western Ghats of India. Description of eight new species, systematics, and comments on the biogeography of the genus. European Journal of Phycology 56: 142–158. https://doi.org/10.1080/09670262.2020.1783460
Mann, D.G. (1999) Crossing the Rubicon: the effectiveness of the marine/freshwater interface as a barrier to the migration of diatom germplasm. In: Mayama, S., Idei, M. & Koizumi, I. (Eds.) Proceedings of the 14<sup>th</sup> International Diatom Symposium. Koeltz Scientific Books, Koenigstein, pp. 1–21.
Metzeltin, D., Lange-Bertalot, H. & García-Rodríguez, F. (2005) Diatoms of Uruguay. Compared with other taxa from South America and elsewhere. Diatomologica Iconographia 15: 1–736.
Patrick, R.M. & Reimer, C.W. (1966) Diatoms of the United States, exclusive of Alaska and Hawaii. Volume 1. Monograph No. 13, Academy of Natural Sciences of Philadelphia. 688 pp. https://doi.org/10.2307/1351135
Rabenhorst, L. (1861) Die Algen Europa’s. Decas 119–120. https://doi.org/10.1002/jlac.18611200113
Round, F.E., Crawford, R.W. & Mann, D.G. (1990) The Diatoms. Biology and Morphology of the Genera. Cambridge University Press, Cambridge. 747 pp.
Round, F.E. & Sims, P.A. (1980) The distribution of diatom genera in marine and freshwater environments and some evolutionary considerations. In: Ross, R. (Ed.) Proceedings of the Sixth Symposium of Recent and Fossil Diatoms. Otto Koeltz Scientific Publishers, Hirschberg, pp. 301–320.
Rushforth, S.R., St. Clair, L.L., Leslie, T.A., Thorne, K.H. & Anderson, D.C. (1976) The algal flora of two hanging gardens in Southeastern Utah. Nova Hedwigia 27: 231–323.
Rybak, M., Kochman-K?dziora, N. & Peszek, ?. (2021) Description of four new terrestrial diatom species from Luticola and Microcostatus genera from South Africa. PhytoKeys 182: 1–26. https://doi.org/10.3897/phytokeys.181.65326
Rybak, M., Witkowski, A., Peszek, L., Kociolek, J.P., Risjani, R., Nguyen, H.D., Zhang, J., Yunianta, Y. Nguyen, V.D., Gastineau, R., Duong, T.T., Rosa, P. & Meleder, V. (2022) Brackish and marine Luticola D.G.Mann (Bacillariophyta) species from the Java Sea and South China Sea coasts with the description of three new species. Phytokeys 183: 115–142.
Simonato, J., Kociolek, J.P., Sala, S.E., Díaz, Y.P. & Núñez-Avellaneda, M. (2020) Three new Luticola species from the Andean-Amazonian transition in Colombia: taxonomy, morphology and preliminary considerations of the biogeography of the genus. Diatom Research 35: 377–393. https://doi.org/10.1080/0269249X.2020.1813205
Simonsen, R. (1987) Atlas and Catalogue of the Diatom Types of Friedrich Hustedt. Volume 3: Atlas, Plates 396–772. J. Cramer, Berlin, Stuttgart.
Tsegmid, B. (2020) Diatoms in Yeroo and Kharaa River Basin, Mongolia. Yerunkhiy Boloon Sorilyn Biological Khureelengiin Buteel 32: 1–6.
West, W. & West, G.S. (1911) Freshwater Algae. British Antarctic Expedition 1907–1909 1: 263–298.
Zidarova, R., Levkov, Z. & Van De Vijver, B. (2014) Four new Luticola taxa (Bacillariophyta) from Maritime Antarctica. Phytotaxa 170 (3): 155–168. https://doi.org/10.11646/phytotaxa.170.3.2
Bahls, L.L. (2013) New diatoms (Bacillariophyta) from western North America. Phytotaxa 82 (1): 7–28. https://doi.org/10.11646/phytotaxa.82.1.2
B?k, M., Kryk, A., Peszek, ?., Kociolek, J.P., Bemiasa, J. & Bemanaja, E. (2019) New and interesting Luticola species (Bacillariophyta) from the mangroves of Nosy Be Island, NW Madagascar. Oceanological and Hydrobiological Studies 48: 13–22. https://doi.org/10.1515/ohs-2019-0002
Bock, W. (1963) Diatomeen extreme trockener Standorte. Nova Hedwigia 5: 199–254.
Bock, W. (1970) Felsen und mauern als diatomeenstandorte. In: Gerloff, J. & Cholnoky, J.B. (eds.) Diatomaceae II. Beihefte zur Nova Hedwigia 31: 395–441. https://doi.org/10.1127/nova.beihefte/31/1970/395
Carlson, G.W.F. (1913) Süsswasser-Algen aus der Antarktis, Süd-Georgien und den Falkland Inseln. In: Wissenschaftliche Ergebnisse der Schwedischen Südpolar-Expedition 1901-1903, unter leitung von Dr. Otto Nordenskjöld. Band 4 (Lieferung 14). Stockholm, Lithographisches Institut des Generalstabs. 94 pp.
Cleve, P.T. (1894) Synopsis of the naviculoid diatoms, Part 1. Kongelige Svenska Vetenskaps-Akademiens Handlingar 26: 1–194.
Das, S.K., Rawat, D.S., Dash, S.S., Banerjee, A., Sinha, B.K. & Singh, P. (2020) Moss-inhabiting diatoms as ecological indicators in Neora Valley National Park (Eastern Himalaya), India. Tropical Ecology 61: 226–237. https://doi.org/10.1007/s42965-020-00083-9
Frenguelli, J. (1941) XVI Contribución al conocimiento de las diatomeas argentinas. Diatomeas del Río de la Plata. Revista del Museo de la Plata, Nueva Serie 3, Sección Botánica 15: 213–334.
Hustedt, F. (1964) Die Kieselalgen Deutschlands, Österreichs und der Schweiz unter Berücksichtigung der übrigen Länder Europas sowie der angrenzenden Meeresgebiete. In: Rabenhorst, L. (Ed.) Kryptogamen Flora von Deutschland, Österreich und der Schweiz. Akademische Verlagsgesellschaft m.b.h. Leipzig. 7 (Teil 3, Lief. 4). pp. 557–816.
Johansen, J.R. & Rushforth, S.R. (1981) Diatoms of surface waters and soils of selected oil shale lease areas of Eastern Utah. Nova Hedwigia 34: 333–390.
Johansen, J.R., Rushforth, S.R., Orbendorfer, R., Fungladda, N. & Grimes, J.A. (1983) The algal flora of selected wet walls in Zion National Park, USA. Nova Hedwigia 38: 765–810.
Kociolek, J.P., Balasubramanian, K., Blanco, S., Coste, M., Ector, L., Liu, Y., Kulikovskiy, M., Lundholm, N., Ludwig, T., Potapova, M., Rimet, F., Sabbe, K., Sala, S., Sar, E., Taylor, J., Van de Vijver, B., Wetzel, C.E., Williams, D.M., Witkowski, A. & Witkowski, J. (2022) DiatomBase. Accessed at: http://www.diatombase.org (accessed 13 July 2022)
Kohler, T.J., Kopalova, K. Van De Vijver, B. and Kociolek, J.P. (2015) The genus Luticola D.G.Mann (Bacillariophyta) from the McMurdo Sound Region, Antarctica, with the description of four new species Phytotaxa 208 (2): 103–134. https://doi.org/10.11646/phytotaxa.208.2.1
Kopalová, K., Nedbalová, L., De Haan, M. & Van De Vijver, B. (2011) Description of five new species of the diatom genus Luticola (Bacillariophyta, Diadesmidaceae) found in lakes of James Ross Island (Maritime Antarctic Region). Phytotaxa 27 (1): 44–60. https://doi.org/10.11646/phytotaxa.27.1.5
Levkov, Z., Metzeltin, D. & Pavlov, A. (2013) Luticola and Luticopsis. Diatoms of Europe 7: 1–698.
Lokhande, V., Radhakrishnan, C., Kociolek, J.P., Lowe, R.L. & Karthick, B. (2020) The diatom genus Luticola D.G. Mann (Bacillariophyceae) in the Western Ghats of India. Description of eight new species, systematics, and comments on the biogeography of the genus. European Journal of Phycology 56: 142–158. https://doi.org/10.1080/09670262.2020.1783460
Mann, D.G. (1999) Crossing the Rubicon: the effectiveness of the marine/freshwater interface as a barrier to the migration of diatom germplasm. In: Mayama, S., Idei, M. & Koizumi, I. (Eds.) Proceedings of the 14<sup>th</sup> International Diatom Symposium. Koeltz Scientific Books, Koenigstein, pp. 1–21.
Metzeltin, D., Lange-Bertalot, H. & García-Rodríguez, F. (2005) Diatoms of Uruguay. Compared with other taxa from South America and elsewhere. Diatomologica Iconographia 15: 1–736.
Patrick, R.M. & Reimer, C.W. (1966) Diatoms of the United States, exclusive of Alaska and Hawaii. Volume 1. Monograph No. 13, Academy of Natural Sciences of Philadelphia. 688 pp. https://doi.org/10.2307/1351135
Rabenhorst, L. (1861) Die Algen Europa’s. Decas 119–120. https://doi.org/10.1002/jlac.18611200113
Round, F.E., Crawford, R.W. & Mann, D.G. (1990) The Diatoms. Biology and Morphology of the Genera. Cambridge University Press, Cambridge. 747 pp.
Round, F.E. & Sims, P.A. (1980) The distribution of diatom genera in marine and freshwater environments and some evolutionary considerations. In: Ross, R. (Ed.) Proceedings of the Sixth Symposium of Recent and Fossil Diatoms. Otto Koeltz Scientific Publishers, Hirschberg, pp. 301–320.
Rushforth, S.R., St. Clair, L.L., Leslie, T.A., Thorne, K.H. & Anderson, D.C. (1976) The algal flora of two hanging gardens in Southeastern Utah. Nova Hedwigia 27: 231–323.
Rybak, M., Kochman-K?dziora, N. & Peszek, ?. (2021) Description of four new terrestrial diatom species from Luticola and Microcostatus genera from South Africa. PhytoKeys 182: 1–26. https://doi.org/10.3897/phytokeys.181.65326
Rybak, M., Witkowski, A., Peszek, L., Kociolek, J.P., Risjani, R., Nguyen, H.D., Zhang, J., Yunianta, Y. Nguyen, V.D., Gastineau, R., Duong, T.T., Rosa, P. & Meleder, V. (2022) Brackish and marine Luticola D.G.Mann (Bacillariophyta) species from the Java Sea and South China Sea coasts with the description of three new species. Phytokeys 183: 115–142.
Simonato, J., Kociolek, J.P., Sala, S.E., Díaz, Y.P. & Núñez-Avellaneda, M. (2020) Three new Luticola species from the Andean-Amazonian transition in Colombia: taxonomy, morphology and preliminary considerations of the biogeography of the genus. Diatom Research 35: 377–393. https://doi.org/10.1080/0269249X.2020.1813205
Simonsen, R. (1987) Atlas and Catalogue of the Diatom Types of Friedrich Hustedt. Volume 3: Atlas, Plates 396–772. J. Cramer, Berlin, Stuttgart.
Tsegmid, B. (2020) Diatoms in Yeroo and Kharaa River Basin, Mongolia. Yerunkhiy Boloon Sorilyn Biological Khureelengiin Buteel 32: 1–6.
West, W. & West, G.S. (1911) Freshwater Algae. British Antarctic Expedition 1907–1909 1: 263–298.
Zidarova, R., Levkov, Z. & Van De Vijver, B. (2014) Four new Luticola taxa (Bacillariophyta) from Maritime Antarctica. Phytotaxa 170 (3): 155–168. https://doi.org/10.11646/phytotaxa.170.3.2