Abstract
Microcostatus labrisicus sp. nov., a terrestrial species, is described from mosses growing on concrete flower beds in Gaharu Park (Sambas city, Borneo Island). Its morphology was studied with light and scanning electron microscopy revealed a set of unique morphological features. The new species differs from all other Microcostatus species by having an unusual arrangement of longitudinal depressions, positioned on both sides of sternum. They are separated by thickened fascia with the shape of a symmetric double-headed axe. A detailed morphological comparison taxa with similar morphological characteristics and additional information on the associated diatom flora is also provided.
References
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<p>Kolkwitz, R. & Krieger, W. (1936) Zur Ökologie der Pflanzenwelt, insbesondere der Algen, des Vulkans Pangerango in West-Java. <em>Berichte der Deutschen Botanischen Gesellschaft</em> 54 (2): 65–91.</p>
<p>Krammer, K. & Lange-Bertalot, H. (1986) Bacillariophyceae 1. Teil: Naviculaceae. <em>In:</em> S<em>üswasserflora von Mitteleuropa.</em> pp. 1–876.</p>
<p>Kützing, F.T. (1844) <em>Die Kieselschaligen. Bacillarien oder Diatomeen</em>. Nordhausen, 152 pp. https://doi.org/10.5962/bhl.title.64360</p>
<p>Kützing, F.T. (1849) <em>Species algarum. </em>Lipsiae [Leipzig]: F.A. Brockhaus, 922 pp.</p>
<p>Lange-Bertalot, H. & Steindorf, A. (1996) Rote Liste der limnischen Kieselalgen (<em>Bacillariophyceae</em>) Deutschlands. <em>Schriftenreihe für Vegetationskunde </em>28: 633–677.</p>
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<p>Round, F.E., Crawford, R.M. & Mann, D.G. (1990) <em>The diatoms biology and morphology of the genera</em>. Cambridge: Cambridge University Press, 747 pp.</p>
<p>Rybak, M., Solak, C.N., Noga, T., Glushchenko, A., Williams, D.M. & Kulikovskiy, M. (2019) <em>Nupela brevistriata</em> sp. nov. – a new, terrestrial diatom species from Southeast Asia. <em>Diatom Research</em> 34 (4): 251–258. https://doi.org/10.1080/0269249X.2019.1698467</p>
<p>Rybak, M., Kochman-Kędziora, N. & Peszek, Ł. (2021) Description of four new terrestrial diatom species from <em>Luticola</em> and <em>Microcostatus</em> genera from South Africa. <em>PhytoKeys</em> 182: 1–26. https://doi.org/10.3897/phytokeys.181.65326</p>
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<p>Antoniades, D., Hamilton, P.B., Hinz, F., Douglas, M.S.V. & Smol, J.P. (2009) Seven new species of freshwater diatoms (Bacillariophyceae) from the Canadian Arctic Archipelago. <em>Nova Hedwigia</em> 88: 57–80. https://dx.doi.org/10.1127/0029-5035/2009/0088-0057</p>
<p>Barber, H.G. & Haworth, E.Y. (1981) <em>A guide to the morphology of the diatom frustules. Freshwater Biological Association</em>, Scientific Publications No. 44, Cambria, 112 pp.</p>
<p>Bąk, M, Kociolek, J.P., Lange-Bertalot, H., Łopato, D., Witkowski, A., Zgłobicka, I., Seddon, A.W.R. (2017) Novel diatom species (Bacillariophyta) from the freshwater discharge site of Laguna Diablas (Island Isabella = Albemarle) from the Galapagos. <em>Phytotaxa</em> 311 (3): 201–224. https://dx.doi.org/10.11646/phytotaxa.311.3.1</p>
<p>Beauger, A., Wetzel, C., Allain, E., Bertin, C., Voldoire, O. , Breton, V., Baker, L.-A., Kolovi, S., Biron, D. & Ector, L. (2022) <em>Chamaepinnularia salina</em> (Bacillariophyta), a new diatom species from French mineral springs (Massif Central). <em>Phytotaxa </em>538 (1): 55–73. https://doi.org/10.11646/phytotaxa.538.1.5</p>
<p>Bourrelly, P. & Manguin, É. (1952) <em>Algues d’eau douce de la Guadeloupe et dépendances: recueillies par la Mission P. Allorge en 1936.</em> Paris: Société d’Édition d’Enseignement Superiéur, 282 pp.</p>
<p>Brendemühl, I (1949) Über die Verbreitung der Erddiatomeen. <em>Archiv für Mikrobiologie</em> 14 (3): 407–449. https://doi.org/10.1007/BF00508850</p>
<p>Ettl, H. & Gärtner, G. (1995) <em>Sylabus der Boden-, Luft-und Flechtenalgen</em>. Gustaw FischerVerlag, Stuttgart, Jena, New York, 721 pp.</p>
<p>Foets, J. & Wetzel, C.E. (2018) <em>Sellaphora harderi</em> (Hustedt) comb. nov. (Bacillariophyta, Sellaphoraceae), an overlooked terrestrial diatom. <em>Notulae Algarum</em> 52: 1–5.</p>
<p>Glushchenko, A.M., Kuznetsova, I.V. & Kulikovskiy, M.S. (2021) <em>The Diatoms of SoutheastAsia</em>. Yaroslavl.Filigran, 320 pp.</p>
<p>Grunow, A. (1865) <em>Über die von Herrn Gerstenberger in Rabenhorst›s Decaden ausgegeben Süsswasser Diatomaceen und Desmidiaceen von der Insel Banka, nebst Untersuchungen über die Gattungen Ceratoneis und Frustulia</em>. <em>In</em>: Rabenhorst, L. (Eds.) Beiträge zur näheren Kenntniss und Verbreitung der Algen. Leipzig: Verlag von Eduard Kummer. Heft II,16 pp.</p>
<p>Guiry, M.D. & Guiry, G.M. (2022) <em>AlgaeBase</em>. World-wide electronic publication, National University of Ireland, Galway. Available from: https://www.algaebase.org (accessed 1 February 2022)</p>
<p>Hustedt, F. (1930) Bacillariophyta (Diatomeae) Zweite Auflage.<em> In: </em>Pascher, A. (Ed.)<em> Die Süsswasser-Flora Mitteleuropas</em>. Heft 10. Jena: Verlag von Gustav Fischer. 466 pp.</p>
<p>Hustedt, F. (1937) Systematische und ökologische Untersuchungen über die Diatomeen-Flora von Java, Bali und Sumatra nach dem Material der Deutschen Limnologischen Sunda-Expedition. <em>Archiv für Hydrobiologie</em> Suppl. 15 (2): 187–295.</p>
<p>Hustedt, F. (1942) Aërophile Diatomeen in der nordwestdeutschen Flora. <em>Berichte der Deutschen Botanischen Gesellschaft</em> 60 (1): 55–73.</p>
<p>Hustedt, F. (1949) <em>Süsswasser-Diatomeen aus dem Albert-Nationalpark in Belgisch-Kongo</em>. Exploration du Parc National Albert, Mission H. Damas (1935–1936), Institut des Parcs Nationaux du Congo Belge, 199 pp.</p>
<p>Hustedt, F. (1957) Die Diatomeenflora des Fluß-systems der Weser im Gebiet der Hansestadt Bremen. <em>Abhandlungen der Naturwissenschaftlichen Verein zu Bremen</em> 34 (3): 181–440.</p>
<p>Johansen, J.R. & Sray, J.C. (1998) <em>Microcostatus</em> gen. nov., a new aerophilic diatom genus based on <em>Navicula krasskei </em>Hustedt. <em>Diatom Research</em> 13 (1): 93–101. https://dx.doi.org/10.1080/0269249X.1998.9705436</p>
<p>Kezlya, E., Glushchenko, A., Maltsev, Y., Gusev, E., Genkal, S., Kuznetsov, A., Kociolek, J.P. & Kulikovskyi, M. (2020a) <em>Placoneis cattiensis</em> sp. nov.—a new, diatom (Bacillariophyceae: Cymbellales) soil species from Cát Tiên National Park (Vietnam). <em>Phytotaxa</em> 460 (4): 237–248. https://doi.org/10.11646/phytotaxa.460.4.1</p>
<p>Kezlya, E., Glushchenko, A., Kociolek, J.P., Maltsev, Y., Martynenko, N., Genkal, S. & Kulikovskyi, M. (2020b) <em>Mayamaea vietnamica</em> sp. nov.: a new, terrestrial diatom (Bacillariophyceae) species from Vietnam. Algae 35 (4): 325–335. https://doi.org/10.4490/algae.2020.35.11.23</p>
<p>Kolkwitz, R. & Krieger, W. (1936) Zur Ökologie der Pflanzenwelt, insbesondere der Algen, des Vulkans Pangerango in West-Java. <em>Berichte der Deutschen Botanischen Gesellschaft</em> 54 (2): 65–91.</p>
<p>Krammer, K. & Lange-Bertalot, H. (1986) Bacillariophyceae 1. Teil: Naviculaceae. <em>In:</em> S<em>üswasserflora von Mitteleuropa.</em> pp. 1–876.</p>
<p>Kützing, F.T. (1844) <em>Die Kieselschaligen. Bacillarien oder Diatomeen</em>. Nordhausen, 152 pp. https://doi.org/10.5962/bhl.title.64360</p>
<p>Kützing, F.T. (1849) <em>Species algarum. </em>Lipsiae [Leipzig]: F.A. Brockhaus, 922 pp.</p>
<p>Lange-Bertalot, H. & Steindorf, A. (1996) Rote Liste der limnischen Kieselalgen (<em>Bacillariophyceae</em>) Deutschlands. <em>Schriftenreihe für Vegetationskunde </em>28: 633–677.</p>
<p>Lange-Bertalot, H. (1999) Neue Kombinationen von taxa in der Gattung <em>Microcostatus</em> Johansen & Sray 1998. <em>Iconographia Diatomologica</em> 6: 290–291.</p>
<p>Lange-Bertalot, H., Cavacini, P., Tagliaventi, N. & Alfinito, S. (2003) Diatoms of Sardinia. Rare and 76 new species in rock pools and other ephemeral waters. A.R.G. Gantner Verlag K.G. <em>Iconographia Diatomologica</em> 12: 1–438.</p>
<p>Liu, Y., Kociolek, P.J., Wang, Q., Li, L. & Fan, Y. (2021) New and interesting freshwater diatoms (Bacillariophyceae) from a biodiversity hotspot area in China. <em>Fottea</em> 21 (1): 16–33. https://doi.org/10.5507/fot.2020.013</p>
<p>Lowe, R.L., Kociolek, P., Johansen, J.R., Van de Vijver, B., Lange-Bertalot, H. & Kopalová, K. (2014) <em>Humidophila</em> gen.nov., a new genus for a group of diatoms (Bacillariophyta) formerly within the genus <em>Diadesmis</em>: species from Hawai›i, including one new species. <em>Diatom Research</em> 29 (4): 351–360. https://doi.org/10.1080/0269249X.2014.889039</p>
<p>Mayer, A. (1917) Beiträge zur Diatomeenflora Bayerns. Part I, A. Bacillariales aus dem Fichtelgebirge und angrenzenden Gebieten. B. Bacillariales aus dem Bayrischen Walde. <em>Denkschriften der Koniglich-Baierischen Botanischen Gesellschaft in Regensburg</em> 13: 1–99.</p>
<p>Metzeltin, D., Lange-Bertalot, H. & Soninkhishig, N. (2009) Diatoms in Mongolia. <em>Iconographia Diatomologica</em> 20: 1–686.</p>
<p>Rabenhorst, L. (1848-1860). <em>Die Algen Sachsens. Resp. Mittel-Europa›s Gesammelt und herausgegeben von Dr. L. Rabenhorst</em>. Dresden., Dec. 1-100. No. 1-1000.</p>
<p>Rabenhorst, L. (1864) <em>Flora Europaea Algarum aquae dulcis et submarinae. Sectio I. Algas diatomaceas complectens, cum figuris generum omnium xylographice impressis. </em>Lipsiae apud Eduardum Kummerum, Leipzig (Lipsiae), 359 pp.</p>
<p>Round, F.E., Crawford, R.M. & Mann, D.G. (1990) <em>The diatoms biology and morphology of the genera</em>. Cambridge: Cambridge University Press, 747 pp.</p>
<p>Rybak, M., Solak, C.N., Noga, T., Glushchenko, A., Williams, D.M. & Kulikovskiy, M. (2019) <em>Nupela brevistriata</em> sp. nov. – a new, terrestrial diatom species from Southeast Asia. <em>Diatom Research</em> 34 (4): 251–258. https://doi.org/10.1080/0269249X.2019.1698467</p>
<p>Rybak, M., Kochman-Kędziora, N. & Peszek, Ł. (2021) Description of four new terrestrial diatom species from <em>Luticola</em> and <em>Microcostatus</em> genera from South Africa. <em>PhytoKeys</em> 182: 1–26. https://doi.org/10.3897/phytokeys.181.65326</p>
<p>Rybak, M., Glushchenko, A., Witkowski, A., Lange-Bertalot, H. & Kulikovskyi, M. (2022) Diversity of the genus <em>Orthoseira</em> Thwaites (Bacillariophyceae) from Southeast Asia and Rapa Nui Island with descriptions of four new taxa. <em>Diatom Research </em>37 (1): 1–16. https://doi.org/10.1080/0269249X.2022.2043448</p>
<p>Simonsen, R. (1987) <em>Atlas and catalogue of the diatom types of Friedrich Hustedt</em>. Vol. 1. Catalogue. J. Cramer, Berlin & Stuttgart. pp. 525.</p>
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