Abstract
A morphological variability study was carried out on the type material of Alveolophora jouseana using light and scanning electron microscopy. The new observations allowed us to extend diagnostic descriptions for the ultrastructure of this taxon, as well as its biometrics regarding diameter, number of areolar rows in 10 μm, and number of costae in 10 µm. Alveolophora jouseana shows a close similarity to A. baicalensis, another species of the same genus with which it co-occurs.
References
<p>Bradbury, J.P. (1986) Fossil diatoms and Neogene paleolimnology. <em>Palaeogeography, Palaeoclimatology, Palaeoecology</em> 62: 299–316. https://doi.org/10.1016/0031-0182(88)90059-4</p>
<p>Bradbury, J.P. & Krebs, W.N. (1982) Neogene and Quaternary lacustrine diatoms of the western Snake River Basin, Idaho-Oregon, USA. <em>Acta Geologica Academiae Scientiarum Hungaricae</em> 25: 97–122.</p>
<p>Edgar, S.M. & Theriot, E.C. (2004) Phylogeny of <em>Aulacoseira</em> (Bacillariophyta) based on molecules and morphology. <em>Journal of Phycology</em> 40: 772–788. https://doi.org/10.1111/j.1529-8817.2004.03126.x</p>
<p>Grunow, A. (1862) Die österreichischen Diatomaceen nebst Anschluss einiger neuen Arten von andern Lokalitäten und einer kritischen Uebersicht der bisher bekannten Gattungen und Arten. <em>Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien</em> 12: 315–472. https://doi.org/10.5962/bhl.title.64361</p>
<p>Houk, V. (2010) Re-examination of a <em>Sphaeorotermia</em> and a <em>Gaillonella</em> from the Ehrenberg Collection, Berlin (Germany). <em>Diatom Research</em> 25: 293–306. https://doi.org/10.1080/0269249X.2010.9705851</p>
<p>Houk, V. & Klee, R. (2007) Atlas of freshwater centric diatoms with a brief key and descriptions. Part II. Melosiraceae and Aulacoseiraceae (Supplement of Part I). <em>Fottea</em> 7: 85–108.</p>
<p>Jousé, A.P. (1952) About the history of the diatom flora of Lake Chanka. <em>Trudy Inst. Geogr. Akad. Nauk SSSR</em> 51: 226–252.</p>
<p>Khursevich, G.K. & Fedenya, S.A. (2006) Morphology of new fossil species of <em>Concentrodiscus</em> and <em>Alveolophora</em> (Bacillariophyta) from bottom sediment of Lake Baikal. <em>International Journal on Algae</em> 8: 78–90. https://doi.org/10.1615/InterJAlgae.v8.i1.80</p>
<p>Khursevich, G.K. & Kociolek, J.P. (2012) A preliminary, worldwide inventory of the extinct, freshwater fossil diatoms from the orders Thalassiosirales, Stephanodiscales, Paraliales, Aulacoseirales, Melosirales, Coscindiscales, and Biddulphiales. <em>Nova Hedwigia, Beiheft </em>141: 315–364.</p>
<p>Kozyrenko, Т.F., Strelnikova, N.I., Khursevich, G.K., Tsoy, I.B., Zhakovschikova, T.K., Mukhina, V.V., Olshtynskaja, A.P. & Semina, G.I. (2008) <em>The diatoms of Russia and adjacent countries. Fossil and recent II</em> <em>(5).</em> St. Petersburg University Press, St. Petersburg, 171 pp. [in Russian]</p>
<p>Krammer, K., Lange-Bertalot, H. & Shiller, W. (1997) <em>Miosira rhoenana </em>n. gen. n. sp. (Bacillariophyceae) aus miozänen limnischen Sedimenten der Rhönim Vergleich mit anderen zentrischen Diatomeen. <em>Paläontologische Zeitschrift </em>71: 5–18. https://doi.org/10.1007/BF03022543</p>
<p>Kuzmin, M.I., Khursevich, G.K., Prokopenko, A.A., Sedenya, S.A. & Karabanov, E.B. (2009) <em>Late Cenozoic centric diatoms of Lake Baikal</em>. Academic Publishing House Geo, Novosibirsk, 370 pp. [in Russian]</p>
<p>Likhacheva, O. Yu., Pushkar‘, V.S., Cherepanova, M.V. & Pavlyutkin, B.I. (2009) Zonal diatom scale and the basic geobiologic events of Neogene Primorye. <em>Vestnik DVO RAN </em>4: 64–72. [in Russian]</p>
<p>Likhoshway, Ye.V. & Crawford, R.M. (2001) The rimoportula – a neglected feature in the systematics of <em>Aulacoseira</em>.<em> In: </em> Economou-Amilli, A. (Ed.)<em> proceedings of 16th international diatom symposium</em>. University of Athens, Athens, pp. 33–47.</p>
<p>Moisseeva, A.I. (1971) Atlas of neogene diatoms of the Primorye.<em> In:</em> <em>Trudy Vsesoiznogo neftyaanogo nauchno-issledovatelskogo geologo-razvedochnogo instituta (VSEGEI). </em>Nedra, Leningrad, 152 pp. [in Russian]</p>
<p>Moisseeva, A.I. (1981) Revision of the taxonomic position of freshwater species of the genus Melosira Ag. (Bacillariophyta).<em> In:</em> <em>Systematics, evolution, ecology of algae and their importance in the practice of geological research</em>. Naukova dymka, Kiev. pp. 124–126. [in Russian]</p>
<p>Moisseeva, A.I. & Nevretdinova, T.L. (1990) The new family and genus of freshwater diatoms. <em>Botanicheskii Zhurnal</em> 75: 539–544. [in Russian]</p>
<p>Ognjanova, N. & Crawford, R. (2012) Morphology and ultrastructure of the fossil freshwater diatom <em>Aulacoseira temperei</em>. <em>Diatom Research</em> 27 (3–4): 107–119. https://doi.org/10.1080/0269249X.2012.696495</p>
<p>Ognjanova, N. & Pipík, R. (2015) Stratigraphic and taxonomic significance of siliceous microfossils collected from the Turiec Basin, Western Carpathians (Slovakia). <em>Acta Botanica Croatica</em> 74 (2): 1–17. https://doi.org/10.1515/botcro-2015-0023</p>
<p>Ognjanova-Rumenova, N. & Pipik, R. (2018) <em>Aulacoseira turiecensis</em>, a new fossil species from the Turiec Neogene Basin, Slovakia. <em>Nova Hedwigia, Beiheft</em> 147: 127–139. https://doi.org/10.1127/nova-suppl/2018/012</p>
<p>Skvortzow, B.V. & Meyer, K.I. (1928) A contribution to the diatoms of Baikal Lake. <em>Proceedings of the Sungari River Biological Station</em> 1 (5): 1–55. [in Russian]</p>
<p>Temniskova-Topalova, D. & Ognjanova-Rumenova, N. (1997) Description, comparison and biostratigraphy of the nonmarine neogene diatom floras from Southern Bulgaria. <em>Geologica Balcanica</em> 27 (1–2): 57–81.</p>
<p>Tsoy, I.B. & Shastina, V.V. (1999) <em>Siliceous micro-plankton of Neogene in the Sea of Japan (diatoms and radiolarians)</em>. Dal’nauka, Vladivostok, 241 pp. [in Russian]</p>
<p>Thwaites, G.H.K. (1848) Further observation on the Diatomaceae with description of new genera and species. <em>Annals and Magazine of Natural History</em> 21: 161–172. https://doi.org/10.1080/03745485809496091</p>
<p>Usoltseva, M.V. & Khursevich, G.K. (2013) <em>Alveolophora robusta</em> comb. nov. from Miocene deposits of the Vitim Plateau, Russia. <em>Diatom Research</em> 28: 109–114. https://doi.org/10.1080/0269249X.2012.738251</p>
<p>Usoltseva, M.V., Kociolek, J.P. & Khursevich, G.K. (2013) Three new species of <em>Alveolophora </em>(Aulacoseiraceae, Bacillariophyceae) from Miocene deposits in western North America. <em>Phycologia</em> 52: 109–117.</p>
<p> `https://doi.org/10.2216/12-022.1</p>
<p>Usoltseva, M. & Titova, L. (2019) Morphological variability in <em>Alveolophora areolata</em> (Moisseeva) Moisseeva and <em>Alveolophora bifaria </em>Nevretdinova & Moisseeva. <em>Diatom Research</em> 34: 39–47. https://doi.org/10.1080/0269249X.2019.1586777</p>
<p>Usoltseva, M.V. & Tsoy, I.B. (2010) Elliptical species of the freshwater genus <em>Aulacoseira</em> in Miocene sediments from Yamato Rise (Sea of Japan). <em>Diatom Research</em> 25: 397–415. https://doi.org/10.1080/0269249X.2010.9705859</p>
<p>Wang, C., Lek, S., Lai, Z. & Tudesque, L. (2017) Morphology of <em>Aulacoseira </em>filaments as indicator of the aquatic environment in a large subtropical river: The Perl River, China. <em>Ecological Indicators </em>81: 325–332. https://doi.org/10.1016/j.ecolind.2017.06.020</p>
<p>Bradbury, J.P. & Krebs, W.N. (1982) Neogene and Quaternary lacustrine diatoms of the western Snake River Basin, Idaho-Oregon, USA. <em>Acta Geologica Academiae Scientiarum Hungaricae</em> 25: 97–122.</p>
<p>Edgar, S.M. & Theriot, E.C. (2004) Phylogeny of <em>Aulacoseira</em> (Bacillariophyta) based on molecules and morphology. <em>Journal of Phycology</em> 40: 772–788. https://doi.org/10.1111/j.1529-8817.2004.03126.x</p>
<p>Grunow, A. (1862) Die österreichischen Diatomaceen nebst Anschluss einiger neuen Arten von andern Lokalitäten und einer kritischen Uebersicht der bisher bekannten Gattungen und Arten. <em>Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien</em> 12: 315–472. https://doi.org/10.5962/bhl.title.64361</p>
<p>Houk, V. (2010) Re-examination of a <em>Sphaeorotermia</em> and a <em>Gaillonella</em> from the Ehrenberg Collection, Berlin (Germany). <em>Diatom Research</em> 25: 293–306. https://doi.org/10.1080/0269249X.2010.9705851</p>
<p>Houk, V. & Klee, R. (2007) Atlas of freshwater centric diatoms with a brief key and descriptions. Part II. Melosiraceae and Aulacoseiraceae (Supplement of Part I). <em>Fottea</em> 7: 85–108.</p>
<p>Jousé, A.P. (1952) About the history of the diatom flora of Lake Chanka. <em>Trudy Inst. Geogr. Akad. Nauk SSSR</em> 51: 226–252.</p>
<p>Khursevich, G.K. & Fedenya, S.A. (2006) Morphology of new fossil species of <em>Concentrodiscus</em> and <em>Alveolophora</em> (Bacillariophyta) from bottom sediment of Lake Baikal. <em>International Journal on Algae</em> 8: 78–90. https://doi.org/10.1615/InterJAlgae.v8.i1.80</p>
<p>Khursevich, G.K. & Kociolek, J.P. (2012) A preliminary, worldwide inventory of the extinct, freshwater fossil diatoms from the orders Thalassiosirales, Stephanodiscales, Paraliales, Aulacoseirales, Melosirales, Coscindiscales, and Biddulphiales. <em>Nova Hedwigia, Beiheft </em>141: 315–364.</p>
<p>Kozyrenko, Т.F., Strelnikova, N.I., Khursevich, G.K., Tsoy, I.B., Zhakovschikova, T.K., Mukhina, V.V., Olshtynskaja, A.P. & Semina, G.I. (2008) <em>The diatoms of Russia and adjacent countries. Fossil and recent II</em> <em>(5).</em> St. Petersburg University Press, St. Petersburg, 171 pp. [in Russian]</p>
<p>Krammer, K., Lange-Bertalot, H. & Shiller, W. (1997) <em>Miosira rhoenana </em>n. gen. n. sp. (Bacillariophyceae) aus miozänen limnischen Sedimenten der Rhönim Vergleich mit anderen zentrischen Diatomeen. <em>Paläontologische Zeitschrift </em>71: 5–18. https://doi.org/10.1007/BF03022543</p>
<p>Kuzmin, M.I., Khursevich, G.K., Prokopenko, A.A., Sedenya, S.A. & Karabanov, E.B. (2009) <em>Late Cenozoic centric diatoms of Lake Baikal</em>. Academic Publishing House Geo, Novosibirsk, 370 pp. [in Russian]</p>
<p>Likhacheva, O. Yu., Pushkar‘, V.S., Cherepanova, M.V. & Pavlyutkin, B.I. (2009) Zonal diatom scale and the basic geobiologic events of Neogene Primorye. <em>Vestnik DVO RAN </em>4: 64–72. [in Russian]</p>
<p>Likhoshway, Ye.V. & Crawford, R.M. (2001) The rimoportula – a neglected feature in the systematics of <em>Aulacoseira</em>.<em> In: </em> Economou-Amilli, A. (Ed.)<em> proceedings of 16th international diatom symposium</em>. University of Athens, Athens, pp. 33–47.</p>
<p>Moisseeva, A.I. (1971) Atlas of neogene diatoms of the Primorye.<em> In:</em> <em>Trudy Vsesoiznogo neftyaanogo nauchno-issledovatelskogo geologo-razvedochnogo instituta (VSEGEI). </em>Nedra, Leningrad, 152 pp. [in Russian]</p>
<p>Moisseeva, A.I. (1981) Revision of the taxonomic position of freshwater species of the genus Melosira Ag. (Bacillariophyta).<em> In:</em> <em>Systematics, evolution, ecology of algae and their importance in the practice of geological research</em>. Naukova dymka, Kiev. pp. 124–126. [in Russian]</p>
<p>Moisseeva, A.I. & Nevretdinova, T.L. (1990) The new family and genus of freshwater diatoms. <em>Botanicheskii Zhurnal</em> 75: 539–544. [in Russian]</p>
<p>Ognjanova, N. & Crawford, R. (2012) Morphology and ultrastructure of the fossil freshwater diatom <em>Aulacoseira temperei</em>. <em>Diatom Research</em> 27 (3–4): 107–119. https://doi.org/10.1080/0269249X.2012.696495</p>
<p>Ognjanova, N. & Pipík, R. (2015) Stratigraphic and taxonomic significance of siliceous microfossils collected from the Turiec Basin, Western Carpathians (Slovakia). <em>Acta Botanica Croatica</em> 74 (2): 1–17. https://doi.org/10.1515/botcro-2015-0023</p>
<p>Ognjanova-Rumenova, N. & Pipik, R. (2018) <em>Aulacoseira turiecensis</em>, a new fossil species from the Turiec Neogene Basin, Slovakia. <em>Nova Hedwigia, Beiheft</em> 147: 127–139. https://doi.org/10.1127/nova-suppl/2018/012</p>
<p>Skvortzow, B.V. & Meyer, K.I. (1928) A contribution to the diatoms of Baikal Lake. <em>Proceedings of the Sungari River Biological Station</em> 1 (5): 1–55. [in Russian]</p>
<p>Temniskova-Topalova, D. & Ognjanova-Rumenova, N. (1997) Description, comparison and biostratigraphy of the nonmarine neogene diatom floras from Southern Bulgaria. <em>Geologica Balcanica</em> 27 (1–2): 57–81.</p>
<p>Tsoy, I.B. & Shastina, V.V. (1999) <em>Siliceous micro-plankton of Neogene in the Sea of Japan (diatoms and radiolarians)</em>. Dal’nauka, Vladivostok, 241 pp. [in Russian]</p>
<p>Thwaites, G.H.K. (1848) Further observation on the Diatomaceae with description of new genera and species. <em>Annals and Magazine of Natural History</em> 21: 161–172. https://doi.org/10.1080/03745485809496091</p>
<p>Usoltseva, M.V. & Khursevich, G.K. (2013) <em>Alveolophora robusta</em> comb. nov. from Miocene deposits of the Vitim Plateau, Russia. <em>Diatom Research</em> 28: 109–114. https://doi.org/10.1080/0269249X.2012.738251</p>
<p>Usoltseva, M.V., Kociolek, J.P. & Khursevich, G.K. (2013) Three new species of <em>Alveolophora </em>(Aulacoseiraceae, Bacillariophyceae) from Miocene deposits in western North America. <em>Phycologia</em> 52: 109–117.</p>
<p> `https://doi.org/10.2216/12-022.1</p>
<p>Usoltseva, M. & Titova, L. (2019) Morphological variability in <em>Alveolophora areolata</em> (Moisseeva) Moisseeva and <em>Alveolophora bifaria </em>Nevretdinova & Moisseeva. <em>Diatom Research</em> 34: 39–47. https://doi.org/10.1080/0269249X.2019.1586777</p>
<p>Usoltseva, M.V. & Tsoy, I.B. (2010) Elliptical species of the freshwater genus <em>Aulacoseira</em> in Miocene sediments from Yamato Rise (Sea of Japan). <em>Diatom Research</em> 25: 397–415. https://doi.org/10.1080/0269249X.2010.9705859</p>
<p>Wang, C., Lek, S., Lai, Z. & Tudesque, L. (2017) Morphology of <em>Aulacoseira </em>filaments as indicator of the aquatic environment in a large subtropical river: The Perl River, China. <em>Ecological Indicators </em>81: 325–332. https://doi.org/10.1016/j.ecolind.2017.06.020</p>