Abstract
From the Netherlands, five more desmid species giving rise to taxonomic confusion are described as new to science: Cosmarium neocrenatum, C. neonotabile, C. palatiniforme, C. regnesiforme and C. sphagnicoliforme. The affinity with similarly looking taxa is discussed.
References
<p>Coesel, P.F.M. & Meesters, J. (2007) <em>Desmids of the Lowlands</em>. KNNV Publishing, Zeist, The Netherlands, 351 pp. https://doi.org/10.1163/9789004277922</p>
<p>Croasdale, H.T. & Flint, E.A. 1988) <em>Flora of New Zealand—Freshwater Algae, Chlorophyta, Desmids.</em> Vol. II., Botany Division, D.S.I.R., Christchurch, 147 pp.</p>
<p>De Bary, A. (1858) <em>Untersuchungen über die Familie der Conjugaten (Zygnemeen und Desmidieen)</em>. A. Förstnerische Buchhandlung, Leipzig, 91 pp. https://doi.org/10.5962/bhl.title.63789</p>
<p>De Brébisson, A. (1856) Liste des Desmidiées observées en Basse-Normandie. <em>Mémoires de la Société des sciences naturelles de Cherbourg</em> 4: 113–166.</p>
<p>Dick, J. (1930) Pfälzische Desmidiaceen. <em>Mitteilungen des Pfälzischen Vereins für Naturkunde Pollichia.</em> N. F. III: 93–144.</p>
<p>Förster, K. (1982) <em>Das Phytoplankton des Süsswassers</em>. 8. Teil, 1. Hälfte.—<em>Conjugatophyceae</em>. E. Schweizerbart, Stuttgart.</p>
<p>Grönblad, R. (1921) New desmids from Finland and northern Russia. <em>Acta Societatis pro Fauna et Flora Fennica</em> 49 (7): 1–78.</p>
<p>Grönblad, R. (1936) Desmids from North Russia (Karelia) collected 1918 at Uhtua (Ukhtinskaya) and Hirvisalmi. <em>Commentationes Biologicae Societas Scientiarum Fennica </em>6: 1–12.</p>
<p>Grönblad, R. (1945) De algis Brasiliensibus, praecipue Desmidiaceis in regione inferiore fluminis Amazonas a Professore August Ginzberger (Wien) anno 1917 collectis. <em>Acta Societatis Scientiarum Fennicae. Series B. Opera Biologica</em> 2 (6): 1–43.</p>
<p>Kouwets, F.A.C. (1988) Remarkable forms in the desmid flora of a small mountain bog in the French Jura. <em>Cryptogamie, Algologie</em> 9 (4): 289–309.</p>
<p>Larsen, E. (1907) Ferskvandsalger fra Vest-Grønland. <em>Meddelelser om Grønland</em> 33: 305–364.</p>
<p>Lenzenweger, R. (1999) <em>Desmidiaceenflora von Österreich</em>. Teil 3., J. Cramer, Berlin/Stuttgart.</p>
<p>Nordstedt, O. (1872) Desmidiaceae ex insulis Spetsbergensibus et Beeren Eiland in expeditionibus annorum 1868 et 1870 suecanis collectae. <em>Öfversigt af Förhandlingar Kongliga Svenska Vetenskaps-Akademien</em> 1872, No 6: 23-42.</p>
<p>Prescott, G.W., Croasdale, H.T., Vinyard, W.C. & Bicudo, C.E.M. (1981) <em>A Synopsis of North American Desmids.</em> Part II, Section 3. University of Nebraska Press, Lincoln/London, 720 pp.</p>
<p>Ralfs, J. (1848) <em>The British Desmidieae</em>. Reeve, Benham & Reeve, London, 226 pp. https://doi.org/10.5962/bhl.title.14791</p>
<p>Reinsch, P. (1867) De speciebus generibusque nonnulis novis ex algarum et fungorum classe. <em>Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft</em> 6: 111–144.</p>
<p>Roy, J. (1893) On Scottish desmidieae (2). <em>Annals of Scottish Natural History</em> 7: 170–180.</p>
<p>Roy, J. & Bisset, J.P. (1894) On Scottish desmidieae (5). <em>Annals of Scottish Natural History</em> 10: 100–105.</p>
<p>Van Geest, A. & Coesel, P.F.M. (2019) Some new and interesting desmids (Streptophyta, Desmidiales) from ephemeral puddles in the urban and industrial areas of Amsterdam (Netherlands). <em>Phytotaxa</em> 387: 119–128. https://doi.org/10.11646/phytotaxa.387.2.4</p>
<p>Van Westen, M.C. & Coesel, P.F.M. (2018) Taxonomic notes on desmids from the Netherlands II, with a description of six new species. <em>Phytotaxa</em> 385: 1–9. https://doi.org/10.11646/phytotaxa.385.1.9</p>
<p>West, W. & West, G.S. (1897) A contribution to the freshwater algae of the south of England<em>. Journal of the Royal Microscopical Society</em> 1897: 467–511. https://doi.org/10.1111/j.1365-2818.1897.tb00946.x</p>
<p>West, W. & West, G.S. (1908) <em>A Monograph of the British Desmidiaceae.</em> Vol. III. Ray Society, London, 274 pp. https://doi.org/10.5962/bhl.title.1619</p>
<p>West, W. & West, G.S. (1912) <em>A Monograph of the British Desmidiaceae.</em> Vol. IV. Ray Society, London, 191 pp. https://doi.org/10.5962/bhl.title.1619</p>
<p>Croasdale, H.T. & Flint, E.A. 1988) <em>Flora of New Zealand—Freshwater Algae, Chlorophyta, Desmids.</em> Vol. II., Botany Division, D.S.I.R., Christchurch, 147 pp.</p>
<p>De Bary, A. (1858) <em>Untersuchungen über die Familie der Conjugaten (Zygnemeen und Desmidieen)</em>. A. Förstnerische Buchhandlung, Leipzig, 91 pp. https://doi.org/10.5962/bhl.title.63789</p>
<p>De Brébisson, A. (1856) Liste des Desmidiées observées en Basse-Normandie. <em>Mémoires de la Société des sciences naturelles de Cherbourg</em> 4: 113–166.</p>
<p>Dick, J. (1930) Pfälzische Desmidiaceen. <em>Mitteilungen des Pfälzischen Vereins für Naturkunde Pollichia.</em> N. F. III: 93–144.</p>
<p>Förster, K. (1982) <em>Das Phytoplankton des Süsswassers</em>. 8. Teil, 1. Hälfte.—<em>Conjugatophyceae</em>. E. Schweizerbart, Stuttgart.</p>
<p>Grönblad, R. (1921) New desmids from Finland and northern Russia. <em>Acta Societatis pro Fauna et Flora Fennica</em> 49 (7): 1–78.</p>
<p>Grönblad, R. (1936) Desmids from North Russia (Karelia) collected 1918 at Uhtua (Ukhtinskaya) and Hirvisalmi. <em>Commentationes Biologicae Societas Scientiarum Fennica </em>6: 1–12.</p>
<p>Grönblad, R. (1945) De algis Brasiliensibus, praecipue Desmidiaceis in regione inferiore fluminis Amazonas a Professore August Ginzberger (Wien) anno 1917 collectis. <em>Acta Societatis Scientiarum Fennicae. Series B. Opera Biologica</em> 2 (6): 1–43.</p>
<p>Kouwets, F.A.C. (1988) Remarkable forms in the desmid flora of a small mountain bog in the French Jura. <em>Cryptogamie, Algologie</em> 9 (4): 289–309.</p>
<p>Larsen, E. (1907) Ferskvandsalger fra Vest-Grønland. <em>Meddelelser om Grønland</em> 33: 305–364.</p>
<p>Lenzenweger, R. (1999) <em>Desmidiaceenflora von Österreich</em>. Teil 3., J. Cramer, Berlin/Stuttgart.</p>
<p>Nordstedt, O. (1872) Desmidiaceae ex insulis Spetsbergensibus et Beeren Eiland in expeditionibus annorum 1868 et 1870 suecanis collectae. <em>Öfversigt af Förhandlingar Kongliga Svenska Vetenskaps-Akademien</em> 1872, No 6: 23-42.</p>
<p>Prescott, G.W., Croasdale, H.T., Vinyard, W.C. & Bicudo, C.E.M. (1981) <em>A Synopsis of North American Desmids.</em> Part II, Section 3. University of Nebraska Press, Lincoln/London, 720 pp.</p>
<p>Ralfs, J. (1848) <em>The British Desmidieae</em>. Reeve, Benham & Reeve, London, 226 pp. https://doi.org/10.5962/bhl.title.14791</p>
<p>Reinsch, P. (1867) De speciebus generibusque nonnulis novis ex algarum et fungorum classe. <em>Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft</em> 6: 111–144.</p>
<p>Roy, J. (1893) On Scottish desmidieae (2). <em>Annals of Scottish Natural History</em> 7: 170–180.</p>
<p>Roy, J. & Bisset, J.P. (1894) On Scottish desmidieae (5). <em>Annals of Scottish Natural History</em> 10: 100–105.</p>
<p>Van Geest, A. & Coesel, P.F.M. (2019) Some new and interesting desmids (Streptophyta, Desmidiales) from ephemeral puddles in the urban and industrial areas of Amsterdam (Netherlands). <em>Phytotaxa</em> 387: 119–128. https://doi.org/10.11646/phytotaxa.387.2.4</p>
<p>Van Westen, M.C. & Coesel, P.F.M. (2018) Taxonomic notes on desmids from the Netherlands II, with a description of six new species. <em>Phytotaxa</em> 385: 1–9. https://doi.org/10.11646/phytotaxa.385.1.9</p>
<p>West, W. & West, G.S. (1897) A contribution to the freshwater algae of the south of England<em>. Journal of the Royal Microscopical Society</em> 1897: 467–511. https://doi.org/10.1111/j.1365-2818.1897.tb00946.x</p>
<p>West, W. & West, G.S. (1908) <em>A Monograph of the British Desmidiaceae.</em> Vol. III. Ray Society, London, 274 pp. https://doi.org/10.5962/bhl.title.1619</p>
<p>West, W. & West, G.S. (1912) <em>A Monograph of the British Desmidiaceae.</em> Vol. IV. Ray Society, London, 191 pp. https://doi.org/10.5962/bhl.title.1619</p>