Thalassiosira duostra (Bacillariophyta), a new for the flora of Russia freshwater diatom species

S. I. Genkal

DOI: https://doi.org/10.31111/nsnr/2019.53.1.7

Full article

Abstract

The study of archive materials has made it possible to specify species composition of the genus Thalassiosira and discover a new for the flora of Russia representative of centric diatoms, T. duostra, in Cheboksary and Tsimlyansk reservoirs and the Oka River. The valve diameter and number of central futoportulae in the examined material differ insignificantly from the original description and published data. By the general valve outline, structure and arrangement of central and marginal fultoportulae and quantitative characteristics, T. duostra is very similar to Сonticribra weissflogii and Thalassiosira faurii, which may result in inaccurate identification of these species. In the Сonticribra weissflogii the rimoportula is located not in a ring of marginal fultoportulae but closer to the valve center and its internal part is significantly larger than in Thalassiosira duostra. The external arrangement of marginal fultoportulae (tubes of the processes are outwardly directed at different angles) and their internal arrangement (the processes are arranged in two rings, they are more dense in the ring which is closer to the valve face) is a good specific feature that differentiates T. duostra and T. faurii.

Keywords: Bacillariophyta, Thalassiosira, frustule morphology, scanning electron microscopy, Russia

Section: Algae

How to cite

Genkal S. I. 2019. Thalassiosira duostra (Bacillariophyta), a new for the flora of Russia freshwater diatom species. Novosti sistematiki nizshikh rastenii 53(1): 7–14. https://doi.org/10.31111/nsnr/2019.53.1.7

References

Balonov I. M. 1975. Preparation of algae for electron microscopy. Metodika izucheniya boigeotsenozov [Methods for the study of biocoenoses]. Moscow: 87–89. (In Russ.).

Genkal S. I. 2011. On morphology, taxonomy and distribution of Thalassiosira bramaputrae и T. lacustris(Bacillariophyta) in Russia. Novosti sistematiki nizshikh rastenii 45: 20–26. (In Russ.).

Genkal S. I., Golokolenova T. B. 2008. Centric diatom algae of the Tsimlyansk reservoir. Povolzhskiy ecologicheskiy zhurnal 3: 178–189. (In Russ.).

Genkal S. I., Korneva L. G. 2001. New findings of diatoms (Centrophyceae) in Volga reservoirs. Algologia 11(4): 457–461. (In Russ.).

Genkal S. I., Kulikovsky M. S. 2009. On the morphology, ecology and distribution of Thalassiosira weissflogii (Bacillariophyta). Povolzhskiy ecologicheskiy zhurnal 3: 183–189. (In Russ.).

Genkal S. I., Okhapkin A. G. 2013. Centric diatoms (Centrophyceae) of the lower reaches of the Oka River (Russian Federation). Hydrobiologicheskiy zhurnal 49(1): 44–61. (In Russ.).

Genkal S. I., Terenko L. M. 2014. New data on the flora of Centrophyceae (Bacillariophyta) of the Black Sea. Hydrobiologicheskiy zhurnal 50(2): 38–49. (In Russ.).

Genkal S. I., Scherbak V. I., Maystrova N. V. 2007. Morphological variability and taxonomy of Thalassiosira faurii (Gasse) Hasle (Bacillariophyta). Novosti sistematiki nizshikh rastenii 41: 26–33. (In Russ.).

Genkal S. I., Terenko L. M., Nestereva D. A. 2009. New data on the centric diatoms (Centrophyceae, Bacillariophyta) of the Danube Region of the Black Sea. Hydrobiologicheskiy zhurnal 45(4): 52–72. (In Russ.).

Kiss K. T., Ács E., Houk É. V., Marvan P., Ector L. 2001. Thalassiosira duostra Pienaar a new centric diatom for the European algal flora. 12th Hungarian algological meeting. Pécs, Hungary, 15–18 May 2001. Pécs: 28.

Kiss K. T., Klee R., Ector L., Ács É. 2012. Centric diatoms of large rivers and tributaries in Hungary: morphology and biogeographic distribution. Acta Botanica Croatica 71(2): 311–363. https://doi.org/10.2478/v10184-011-0067-0

Li Y., Zhao Q., Lu S. 2013. The genus Tahalassiosira of the Guangdong coast, South China Sea. Botanica Marina 56(1): 83–110. https://doi.org/10.1515/bot-2011-0045

Makarova I. V. 1988. Genus: Thalassiosira Cl. Diatomovye vodorosli SSSR (iskopaemye i sovremennye). T. II, vypusk 1 [The diatoms of the USSR (fossil and recent). Vol. II, fasc. 1]. Leningrad: 58–81. (In Russ.).

Pèrez M. C., Maidana N. I., Comas A. 2009. Phytoplankton composition of the Ebro River estuary, Spain. Acta Botanica Croatica 68(1): 11–27.

Pienaar C., Pieterse A. J. H. 1990. Thalassiosira duostra sp. nov. a new fresh water centric diatom from the Vaalriver, South Africa. Diatom Research 5(1): 105–111. https://doi.org/10.1080/0269249X.1990.9705096

Roubeix V., Chalié F., Gasse F. 2014. The diatom Thalassiosira faurii (Gasse) Hasle in the Ziway-Shala lakes (Ethiopia) and implications for paleoclimatic reconstructions: Case study of the Glacial-Holocene transition in East Africa. Palaeogeography, Palaeclimatology, Palaeoecology 402: 104–112. https://doi.org/10.1016/j.palaeo.2014.03.014

Stachura-Sushoples K., Williams D. M. 2009. Description of Conticribra tricircularis, a new genus and species of Thalassiosirales, with a discussion on its relationship to other continuous cribra species of Thalassiosira Cleve (Bacillariophyta) and its freshwater origin. European Journal of Phycology 44(4): 477–486. https://doi.org/10.1080/09670260903225431

Torgan C. L., Vieira A. A. H., Giroldo D., Santos C. B. 2006. Morphological irregularity and small cell size in Thalassiosira duostra maintained in culture. Eighteenth International Diatom Symposium. Miedzyzdroje: 407–416.

Woital A. Z., Kwandrans J. 2006. Diatoms of the Wyźyna Krakowsko-Czestochowska upland (S Poland) — Coscinodiscophyceae (Thalassiosirophycidae). Polish Botanical Journal 51(2): 177–207.