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International Journal on Algae
SJR: 0.216 SNIP: 0.322 CiteScore™: 0.4

ISSN 印刷: 1521-9429
ISSN オンライン: 1940-4328

International Journal on Algae

DOI: 10.1615/InterJAlgae.v5.i4.80
pages 77-89

New species of Stephanodiscus (Bacillariophyta) from the Pleistocene sediments of Lake Baikal

G. K. Khursevich
Institute of Geochemistry and Geophysics, National Academy of Sciences of Belarus, 7, Kuprevich St., Minsk 220141 Republic of Belarus
S. A. Fedenya
Institute of Geochemistry and Geophysics, National Academy of Sciences of Belarus, 7, Kuprevich St., Minsk 220141 Republic of Belarus
M. I. Kuzmin
Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences, Irkutsk 664033, Russia
E. B. Karabanov
Baikal Drilling Project, Department of Geological Sciences, University of South Carolina, Columbia. SC 29208, USA; Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences, Irkutsk 664033, Russia
D. F. Williams
Baikal Drilling Project, Department of Geological Sciences, University of South Carolina, Columbia. SC 29208, USA
A. A. Prokopenko
Baikal Drilling Project, Department of Geological Sciences, University of South Carolina, Columbia. SC 29208, USA; United Institute of Geology, Geophysics and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia

要約

Four new taxa of the genus Stephanodiscus Ehr. (Bacillariophyta), studied under light (LM) and scanning electron microscopes (SEM), are described from the Lake Baikal sediments corresponding to the Brunhes chron in drill core BDP-96-2: Stephanodiscus compactus Khursevich et Fedenya, S. asteroides var. baicalensis Khursevich et Fedenya, S. binderanoides Khursevich et Fedenya and S. distinctus Khursevich var. excentricoides Khursevich. They are distinguished by dimensions of valves, pattern of areolation, number and placement of processes on the valve surface, as well as by the age range. Moreover, one new combination in the composition of this genus is given.


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