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Amphidinium glabrum sp. nov. (Dinophyceae) from the North German Wadden Sea and European Arctic sea ice: morphology, distribution and ecology

Published online by Cambridge University Press:  01 February 2000

MONA HOPPENRATH
Affiliation:
Wattenmeerstation Sylt in der Stiftung AWI, Hafenstrasse 43, D-25992 List/Sylt, Germany
YURI B. OKOLODKOV
Affiliation:
Department of Algology, Komarov Botanical Institute, Russian Academy of Sciences, Prof. Popov Street 2, 197376 St Petersburg, Russia
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Abstract

Light microscopy and scanning electron microscopy were used to study Amphidinium glabrum sp. nov., a new dinoflagellate species from tidal sand flats in the North German Wadden Sea and from the surface water and the lowermost layer of first-year ice in the European Arctic. Cells are strongly flattened dorso-ventrally, with nearly parallel sides in ventral view. The distal region of the strongly displaced cingulum is not connected with the sulcus. There is no surface striation. The sulcus extends from the antapex, where it forms a large excavation, to the apex and further onto the dorsal side of the epicone. The new species is compared with two morphologically similar dinoflagellates: A. scissum Kofoid & Swezy and A. scissoides Lebour. Characters that distinguish the three taxa are: cell shape and size, shape of epicone and hypocone, cell surface, cingulum displacement, distal region of the cingulum and antapical notch.

Type
Research Article
Copyright
© 2000 British Phycological Society

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