Abstract
The genus Punctastriata D.M.Williams & Round (1988: 278) contains 10 species that are difficult to identify under light microscopy (LM) (Wetzel & Ector 2021, Morales et al. 2021). The difficulty lies in the differentiation of the overall valve outline and striation pattern of these species from members of Staurosirella D.M.Williams & Round (1988: 274). Under scanning electron microscopy (SEM), the striae of species of Punctastriata are typically multiseriate, the consequence of a profuse formation of viminules. In Staurosirella, the striae are composed of long and slender vimines delimiting apically oriented lineolae (Morales et al. 2021), while the production of viminules is incomplete and rare (Morales 2005).
References
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<p>Morales, E.A., Novais, M.H., García, M.L., Maidana, N.I. & Morais, M.M. (2021) A new species of <em>Punctastriata</em> (Bacillariophyta, Fragilariophyceae) from temporary streams in southern Portugal. <em>Phytotaxa</em> 507 (3): 261–265. https://doi.org/10.11646/phytotaxa.507.3.3</p>
<p>Moulton, S.R. II, Kennen, J.G., Goldstein, R.M. & Hambrook, J.A. (2002) Revised Protocols for Sampling Algal, Invertebrate, and Fish Communities as Part of the National Water-Quality Assessment Program. Open-file report 02-150. US Department of the Interior, US Geological Survey, Reston, Virginia, 75 pp. https://doi.org/10.3133/ofr2002150</p>
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<p>Van de Vijer, B. & Beyens, L. (2002) <em>Staurosira jolinae</em> sp. nov. and <em>Staurosira circula</em> sp. nov. (Bacillariophyceae), two new fragilarioid diatoms from Subantarctica. <em>Nova Hedwigia</em> 75: 319–331. https://doi.org/10.1127/0029-5035/2002/0075-0319</p>
<p>Van Heurck, H. (1880) <em>Synopsis des Diatomées de Belgique. </em>Atlas. Ducaju et Cie, Anvers, pls. 1–30.</p>
<p>Wetzel, C.E. & Ector, L. (2021) Two new <em>Punctastriata </em>(Bacillariophyta) species from subalpine French lakes. <em>Botany Letters</em> 168: 42–55. https://doi.org/10.1080/23818107.2020.1765865</p>
<p>Williams, D.M. & Round, F.E. (1988 “1987”) Revision of the genus <em>Fragilaria</em>. <em>Diatom Research </em>2 (2): 267–288. https://doi.org/10.1080/0269249X.1987.9705004</p>
<p>Williams, D.M., Chudaev, D.A. & Gololobova, M.A. (2009) <em>Punctastriata glubokoensis</em> spec. nov., a new species of ‘fragilarioid’ diatom from Lake Glubokoe, Russia. <em>Diatom Research</em> 24: 479–485. https://doi.org/10.1080/0269249X.2009.9705814</p>
<p>Czarnecki, D.B. (1994) The freshwater diatoms culture collection at Loras College, Dubuque, Iowa. <em>Proceedings of the 11th International Diatom Symposium. Memoirs of the California Academy of Sciences</em> 17: 155–174.</p>
<p>Ehrenberg, C.G. (1843) Verbreitung und Einfluss des mikroskopischen Lebens in Süd- und Nord-Amerika. <em>Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin </em>1841: 291–445.</p>
<p>Ehrenberg, C.G. (1849) Passatstaub und Blutregen. Ein grofses organisches unsichtbares Wirken und Leben in der Atmosphäre. <em>Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin</em> 1847: 269–460.</p>
<p>Fitzpatrick, F.A., Waite, I.R., D’Arconte, P.J., Meador, M.R., Mauplin, M.A. & Gurtz, M.E. (1998) Revised methods for characterizing stream habitat in the national water-quality assessment program. Report 98–4052. U.S. Geological Survey Water Resources Investigations, Raleigh, North Carolina, 67 pp.</p>
<p>García, M.L., Maidana, N.I., Ector, L. & Morales, E.A. (2017) <em>Staurosira patagonica</em> sp. nov., a new diatom (Bacillariophyta) from southern Argentina, with a discussion on the genus <em>Staurosira</em> Ehrenberg. <em>Nova Hedwigia Beiheft</em> 146: 103–123. https://doi.org/10.1127/1438-9134/2017/123</p>
<p>Hamilton, P.B. & Siver, P.A. (2008) The type of <em>Fragilaria lancettula</em> Schumann 1867 and transfer to the genus <em>Punctastriata</em> as <em>P. lancettula</em> (Schum.) Hamilton & Siver comb. nov. <em>Diatom Research</em> 23: 355–365. https://doi.org/10.1080/0269249X.2008.9705762</p>
<p>Morales, E.A. (2005) Observations of the morphology of some known and new fragilarioid diatoms (Bacillariophyceae) from rivers in the USA. <em>Phycological Research</em> 53: 113–133. https://doi.org/10.1111/j.1440-1835.2005.tb00363.x</p>
<p>Morales, E.A. (2006) <em>Staurosira incerta</em> (Bacillariophyceae) a new fragilarioid taxon from freshwater systems in the United States with comments on the structure of girdle bands in <em>Staurosira</em> Ehrenberg and <em>Staurosirella</em> Williams et Round. <em>In</em>: Manoylov, K. & Ognjanova, N. (Eds.) <em>Fossil and Recent Phycological studies. Dobrina Temniskova-Topalova. Festschrift</em>. Pensoft Publishers and University Publishing House, Sophia, Bulgaria, pp. 133–145.</p>
<p>Morales, E.A., Wetzel, C.E., Novais, M.H., Buczkó, K., Morais, M.M. & Ector, L. (2019) Morphological reconsideration of the araphid genus <em>Pseudostaurosira</em> (Bacillariophyceae), a revision of <em>Gedaniella</em>, <em>Popovskayella</em> and <em>Serratifera</em>, and a description of a new <em>Nanofrustulum</em> species. <em>Plant Ecology and Evolution</em> 152: 262–264. https://doi.org/10.5091/plecevo.2019.1604</p>
<p>Morales, E.A., Novais, M.H., García, M.L., Maidana, N.I. & Morais, M.M. (2021) A new species of <em>Punctastriata</em> (Bacillariophyta, Fragilariophyceae) from temporary streams in southern Portugal. <em>Phytotaxa</em> 507 (3): 261–265. https://doi.org/10.11646/phytotaxa.507.3.3</p>
<p>Moulton, S.R. II, Kennen, J.G., Goldstein, R.M. & Hambrook, J.A. (2002) Revised Protocols for Sampling Algal, Invertebrate, and Fish Communities as Part of the National Water-Quality Assessment Program. Open-file report 02-150. US Department of the Interior, US Geological Survey, Reston, Virginia, 75 pp. https://doi.org/10.3133/ofr2002150</p>
<p>Van Dam, H., Mertens, A. & Sinkeldam, J. (1994) A coded checklist and ecological indicator values of freshwater diatoms from the Netherlands. <em>Netherlands Journal of Aquatic Ecology</em> 28: 117–33. https://doi.org/10.1007/BF02334251</p>
<p>Van de Vijer, B. & Beyens, L. (2002) <em>Staurosira jolinae</em> sp. nov. and <em>Staurosira circula</em> sp. nov. (Bacillariophyceae), two new fragilarioid diatoms from Subantarctica. <em>Nova Hedwigia</em> 75: 319–331. https://doi.org/10.1127/0029-5035/2002/0075-0319</p>
<p>Van Heurck, H. (1880) <em>Synopsis des Diatomées de Belgique. </em>Atlas. Ducaju et Cie, Anvers, pls. 1–30.</p>
<p>Wetzel, C.E. & Ector, L. (2021) Two new <em>Punctastriata </em>(Bacillariophyta) species from subalpine French lakes. <em>Botany Letters</em> 168: 42–55. https://doi.org/10.1080/23818107.2020.1765865</p>
<p>Williams, D.M. & Round, F.E. (1988 “1987”) Revision of the genus <em>Fragilaria</em>. <em>Diatom Research </em>2 (2): 267–288. https://doi.org/10.1080/0269249X.1987.9705004</p>
<p>Williams, D.M., Chudaev, D.A. & Gololobova, M.A. (2009) <em>Punctastriata glubokoensis</em> spec. nov., a new species of ‘fragilarioid’ diatom from Lake Glubokoe, Russia. <em>Diatom Research</em> 24: 479–485. https://doi.org/10.1080/0269249X.2009.9705814</p>