Abstract
This is a taxonomic study of cymbelloid diatoms from the River Adegoy (Krasnodar Territory, Russia). During the survey 24 taxa were recorded including a new species of Delicatophycus. The morphology of Delicatophycus porosus sp. nov. was examined using light and scanning electron microscopy and compared to nine similar species. The new species can be distinguished from similar taxa by a combination of characters: dorsiventral valves with radiate to parallel striae, broadly rounded apices and apical pore fields. Other species found belong to the genera Cymbella, Cymbopleura, Encyonema, Encyonopsis and Reimeria.
References
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<p>Kapustin, D.A., Kociolek, J.P., Glushchenko, A.M. & Kulikovskiy, M.S. (2020) A rediscovery of <em>Cymbella mirabilis</em> Hustedt, a rare endemic diatom, and description of <em>Alveocymba</em> gen. nov. <em>Diatom Research</em> 35: 281–287. https://doi.org/10.1080/0269249X.2020.1772888</p>
<p>Kapustin, D.A., Kulikovskiy, M. & Kociolek, J.P. (2017) <em>Celebesia</em> gen. nov., a new cymbelloid diatom genus from the ancient lake Matano (Sulawesi Island, Indonesia). <em>Nova Hedwigia Beiheft</em> 146: 147–155. https://doi.org/10.1127/1438-9134/2017/147</p>
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<p>Kociolek, J.P., Williams, D.M., Stepanek, J., Liu, Q., Liu, Y., You, Q., Karthick, B. & Kulikovskiy, M. (2019) Rampant homoplasy and adaptive radiation in pennate diatoms. <em>Plant Ecology and Evolution</em> 152: 131–141. https://doi.org/10.5091/plecevo.2019.1612</p>
<p>Kosterin, O.E. & Solovyev, V.I. (2017) Odonata found in mid-summer 2015 and 2016 at the north-westernmost Black Sea Coast of the Caucasus, with the first record of <em>Cordulegaster picta</em> Selys, 1854 in Russian Federation. <em>International Dragonfly Fund–Report</em> 107: 1–43.</p>
<p>Krammer, K. & Lange-Bertalot, H. (1985) Naviculaceae Neue und wenig bekannte Taxa, neue Kombinationen und Synonyme sowie Bemerkungen zu einigen Gattungen. <em>Bibliotheca Diatomologica</em> 9: 1–230.</p>
<p>Krammer, K. (1997a) Die cymbelloiden Diatomeen. Eine Monographie der weltweit bekannten Taxa. Teil 1. Allgemeines und <em>Encyonema</em> Part. <em>Bibliotheca Diatomologica</em> 36: 1–382.</p>
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<p>Kützing, F.T. (1844) <em>Die Kieselschaligen Bacillarien oder Diatomeen</em>. Zu finden bei W. Köhne, Nordhausen, 152 pp. https://doi.org/10.5962/bhl.title.64360</p>
<p>Kützing, F.T. (1849) <em>Species algarum</em>. F.A. Brockhaus, Leipzig, 922 pp.</p>
<p>Lange-Bertalot, H., Hofmann, G., Werum, M. & Cantonati, M. (2017) <em>Freshwater Benthic Diatoms of Central Europe: Over 800 Common Species Used in Ecological Assessment. English edition with updated taxonomy and added species.</em> Koeltz Botanical Books, Schmitten-Oberreifenberg, 942 pp.</p>
<p>Le Cohu, R. & Azémar, F. (2011) Étude morphologique de quelques Cymbellaceae des Pyrénées Françaises incluant la description d’une espèce nouvelle: <em>Delicata couseranensis</em> sp. nov. <em>Cryptogamie Algologie</em> 32: 131–155. https://doi.org/10.7872/crya.v32.iss2.2011.131</p>
<p>Le Cohu, R., Marquié, J. & Tudesque, L. (2019) Three new species of <em>Delicatophycus</em> M.J.Wynne (Gomphonemataceae, Bacillariophyta) from New Caledonia. <em>Notulae algarum</em> 98: 1–2.</p>
<p>Liu, B., Blanco, S. & Lan, Q.Y. (2018) Ultrastructure of <em>Delicata sinensis</em> Krammer et Metzeltin and <em>D. williamsii sp. nov. </em>(Bacillariophyta) from China. Fottea 18: 30–36. https://doi.org/10.5507/fot.2017.009</p>
<p>Liu, B., Zhou, Y.–Y., Blanco, S. & Williams, D.M. (2022) Three new species of <em>Delicatophycus</em> M.J. Wynne (Bacillariophyta) from China, all possessing apical pore fields. <em>Fottea </em>22: 137–151. https://doi.org/10.5507/fot.2021.020</p>
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<p>Chudaev, D.A., Jüttner, I. & Levkov, Z. (2021a) The genus <em>Navicula</em> (Bacillariophyceae, Naviculaceae) from the valley of the Adegoy River (Krasnodar Territory, Russia) and description of two new species. <em>Phytotaxa</em> 494: 208–218. https://doi.org/10.11646/phytotaxa.494.2.3</p>
<p>Chudaev, D.A., Jüttner, I. & Van de Vijver, B. (2021b) <em>Fragilaria irregularis sp. nov.</em> a new araphid species (Fragilariaceae, Bacillariophyta) from the River Adegoy, Krasnodar Territory, Russia. <em>Phytotaxa</em> 508: 221–228. https://doi.org/10.11646/phytotaxa.508.2.11</p>
<p>Cleve, P.T. (1894) Synopsis of the Naviculoid Diatoms, Part I. <em>Kongliga Svenska-Vetenskaps Akademiens Handlingar</em> 26: 1–194.</p>
<p>da Silva, W.J., Machado de Souza, M.G. & Barnes Proena, C.E. (2013a) <em>Cymbella neolanceolata</em> sp. nov., a species formerly known as <em>Cymbella lanceolata</em>. <em>Diatom Research</em> 28: 131–138. https://doi.org/10.1080/0269249X.2012.752412</p>
<p>da Silva, W.J., Jahn, R., Veiga Ludwig, T.A. & Menezes, M. (2013b) Typification of seven species of <em>Encyonema</em> and characterization of <em>Encyonema leibleinii</em> comb. nov. <em>Fottea</em> 13: 119–132. https://doi.org/10.5507/fot.2013.011</p>
<p>Elyashev, A.A. (1957) O prostom sposobe prigotovlenia vysokoprelomlyayushchei sredy dlya diatomovogo analiza. <em>Trudy NII geologii Arktiki</em> 4: 74–75.</p>
<p>Glushchenko, A., Kuznetsova, I., Kociolek, J.P. & Kulikoviskiy, M. (2019) <em>Karthickia verestigmata</em> gen. et sp. nov. – an interesting diatom with frustular morphology similar to several different cymbelloid diatom genera. <em>Phycologia</em> 58: 605–613. https://doi.org/10.1080/00318884.2019.1626605</p>
<p>Gogorev, R.M., Chudaev, D.A., Stepanova, V.A. & Kulikovskiy, M.S. (2018) Russian and English terminological glossary on morphology of diatoms. <em>Novosti sistematiki nizshikh rastenii</em> 52: 265–309. https://doi.org/10.31111/nsnr/2018.52.2.265</p>
<p>Graeff, C.L. & Kociolek, J.P. (2013) New or rare species of cymbelloid diatoms (Bacillariophyceae) from Colorado (USA). <em>Nova</em> <em>Hedwigia</em> 97: 87–116. https://doi.org/10.1127/0029-5035/2013/0106</p>
<p>Guiry, M.D. & Guiry, G.M. (2022) AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. Available from: http://www.algaebase.org (accessed 6 April 2022)</p>
<p>Hantzsch, C.A. (1860) Neue Bacillarien: <em>Nitzschia vivax </em>var.<em> elongata, Cymatopleura nobilis</em>. <em>Hedwigia</em> 2: 1–40.</p>
<p>Heiberg, P.A.C. (1863) <em>Conspectus criticus Diatomacearum Danicarum. Kritisk Oversigt over De Danske Diatomeer.</em> Wilhelm Priors Forlag, Kopenhagen, Copenhagen, 135 pp. https://doi.org/10.5962/bhl.title.68738</p>
<p>Hornemann, J.W. (1810) <em>Icones plantarum sponte nascentium in Regnis Daniae Norvegiae, et in Ducatibus Slesvici et Holsatiae ad illustrandum opus de iisdem plantis, Regio jussu exarandum, Florae Danicae nomine inscriptum.</em> Typis E.A.H. Mölleri, Hauniae. Vol. 8 (fasc. 22, 23, 24). pls. 1261–1440.</p>
<p>Jüttner, I., Krammer, K., Van de Vijver, B., Tuji, A., Simkhada, B., Gurung, S., Sharma, S., Sharma, C. & Cox, E.J. (2010) <em>Oricymba</em> (Cymbellales, Bacillariophyceae), a new cymbelloid genus and three new species from the Nepalese Himalaya. <em>Phycologia</em> 49: 407–423. https://doi.org/10.2216/09-77.1</p>
<p>Kapustin, D.A., Kociolek, J.P., Glushchenko, A.M. & Kulikovskiy, M.S. (2020) A rediscovery of <em>Cymbella mirabilis</em> Hustedt, a rare endemic diatom, and description of <em>Alveocymba</em> gen. nov. <em>Diatom Research</em> 35: 281–287. https://doi.org/10.1080/0269249X.2020.1772888</p>
<p>Kapustin, D.A., Kulikovskiy, M. & Kociolek, J.P. (2017) <em>Celebesia</em> gen. nov., a new cymbelloid diatom genus from the ancient lake Matano (Sulawesi Island, Indonesia). <em>Nova Hedwigia Beiheft</em> 146: 147–155. https://doi.org/10.1127/1438-9134/2017/147</p>
<p>Kelly, M.G., Adams, C., Graves, A.C., Jamieson, J., Krokowski, J., Lycett, E.B., Murray-Bligh, J., Prichard, S. & Wilkins, C. (2001) <em>The trophic diatom index: a user’s manual. Revised edition.</em> Environment Agency, Bristol, 135 pp.</p>
<p>Kociolek, J.P. & Stoermer, E.F. (1987) Ultrastructure of <em>Cymbella sinuata</em> and its allies (Bacillariophyceae), and their transfer to <em>Reimeria</em>, gen. nov. <em>Systematic</em> <em>Botany</em> 12: 451–459. https://doi.org/10.2307/2418882</p>
<p>Kociolek, J.P., Williams, D.M., Stepanek, J., Liu, Q., Liu, Y., You, Q., Karthick, B. & Kulikovskiy, M. (2019) Rampant homoplasy and adaptive radiation in pennate diatoms. <em>Plant Ecology and Evolution</em> 152: 131–141. https://doi.org/10.5091/plecevo.2019.1612</p>
<p>Kosterin, O.E. & Solovyev, V.I. (2017) Odonata found in mid-summer 2015 and 2016 at the north-westernmost Black Sea Coast of the Caucasus, with the first record of <em>Cordulegaster picta</em> Selys, 1854 in Russian Federation. <em>International Dragonfly Fund–Report</em> 107: 1–43.</p>
<p>Krammer, K. & Lange-Bertalot, H. (1985) Naviculaceae Neue und wenig bekannte Taxa, neue Kombinationen und Synonyme sowie Bemerkungen zu einigen Gattungen. <em>Bibliotheca Diatomologica</em> 9: 1–230.</p>
<p>Krammer, K. (1997a) Die cymbelloiden Diatomeen. Eine Monographie der weltweit bekannten Taxa. Teil 1. Allgemeines und <em>Encyonema</em> Part. <em>Bibliotheca Diatomologica</em> 36: 1–382.</p>
<p>Krammer, K. (1997b) Die cymbelloiden Diatomeen. Ein Monographie der weltweit bekannten Taxa. Teil 2. <em>Encyonema</em>, <em>Encyonopsis</em> and <em>Cymbellopsis</em>.<em> Bibliotheca Diatomologica</em> 37: 1–463.</p>
<p>Krammer, K. (1999) Validierung von <em>Cymbopleura</em> nov. gen. <em>Iconographia Diatomologica</em> 6: 292.</p>
<p>Krammer, K. (2002) <em>Cymbella</em>. <em>In:</em> Lange-Bertalot, H. (Ed.) <em>Diatoms of Europe.</em> Vol. 3. A.R.G. Gantner Verlag K.G., Ruggell, pp. 1–584.</p>
<p>Krammer, K. (2003) <em>Cymbopleura, Delicata, Navicymbula, Gomphocymbellopsis, Afrocymbella. In:</em> Lange-Bertalot, H. (Ed.) <em>Diatoms of Europe.</em> Vol. 4. A.R.G Gantner Verlag K.G., Ruggell, pp. 1–530.</p>
<p>Kützing, F.T. (1834) Synopsis diatomearum oder Versuch einer systematischen Zusammenstellung der Diatomeen. <em>Linnaea</em> 8: 529–620. https://doi.org/10.5962/bhl.title.65634</p>
<p>Kützing, F.T. (1844) <em>Die Kieselschaligen Bacillarien oder Diatomeen</em>. Zu finden bei W. Köhne, Nordhausen, 152 pp. https://doi.org/10.5962/bhl.title.64360</p>
<p>Kützing, F.T. (1849) <em>Species algarum</em>. F.A. Brockhaus, Leipzig, 922 pp.</p>
<p>Lange-Bertalot, H., Hofmann, G., Werum, M. & Cantonati, M. (2017) <em>Freshwater Benthic Diatoms of Central Europe: Over 800 Common Species Used in Ecological Assessment. English edition with updated taxonomy and added species.</em> Koeltz Botanical Books, Schmitten-Oberreifenberg, 942 pp.</p>
<p>Le Cohu, R. & Azémar, F. (2011) Étude morphologique de quelques Cymbellaceae des Pyrénées Françaises incluant la description d’une espèce nouvelle: <em>Delicata couseranensis</em> sp. nov. <em>Cryptogamie Algologie</em> 32: 131–155. https://doi.org/10.7872/crya.v32.iss2.2011.131</p>
<p>Le Cohu, R., Marquié, J. & Tudesque, L. (2019) Three new species of <em>Delicatophycus</em> M.J.Wynne (Gomphonemataceae, Bacillariophyta) from New Caledonia. <em>Notulae algarum</em> 98: 1–2.</p>
<p>Liu, B., Blanco, S. & Lan, Q.Y. (2018) Ultrastructure of <em>Delicata sinensis</em> Krammer et Metzeltin and <em>D. williamsii sp. nov. </em>(Bacillariophyta) from China. Fottea 18: 30–36. https://doi.org/10.5507/fot.2017.009</p>
<p>Liu, B., Zhou, Y.–Y., Blanco, S. & Williams, D.M. (2022) Three new species of <em>Delicatophycus</em> M.J. Wynne (Bacillariophyta) from China, all possessing apical pore fields. <em>Fottea </em>22: 137–151. https://doi.org/10.5507/fot.2021.020</p>
<p>Nevo, E. & Wasser, S.P. (2000) <em>Cyanoprocaryotes and algae of continental Israel</em>. A.R.G. Gantner Verlag K.-G., Ruggell, 629 pp.</p>
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