Some centric diatoms (Bacillariophyta) from Neogene deposits of the Fisher Massif (Prince Charles Mountains, East Antarctica)

R. M. Gogorev, Z. V. Pushina

DOI: https://doi.org/10.31111/nsnr/2011.45.32

Full article

Abstract

The richest diatom complexes have revealed due to the study of glacial-marine sediments sampled in the Fisher Massif (Prince Charles Mountains, East Antarctica) during 52nd and 53rd Russian Antarctic Expeditions (Polar Marine Geol. Survey Expedition) in 2006/07 and 2007/08. Three diatom complexes are distinguished according to different palaeoecological conditions: the planktonic one is located in the basis of the outcrop, while mixed planktonic-benthic and benthic ones being located above. The planktonic diatom complexes are dominated by two oceanic species Actinocyclus ingens (up to 8%) and Denticulopsis simonseni (up to 80%). There are 15 planktonic algae, e. g. Eucampia аntarctica, Fragilariopsis spp., Rhizosolenia spp., Rouxia antarctica, Podosira antarctica sp. nov., Stellarima microtrias; and also unknown and non-described benthic diatoms Achnanthes sp., Cocconeis spp., Rhabdonema (s. l.) spp. and Synedra (s. l.) spp. Detailed data on morphology and taxonomy of 10 centric diatoms are presented, including 3 newly described species.

Keywords: Bacillariophyta, centric diatoms, Thalassiosira praegracilis sp. nov., Podosira antarctica sp. nov., Ellerbeckia fisheriensis sp. nov., morphology, taxonomy, Neogene, Fisher Massif, Prince Charles Mountains, East Antarctica

Section: Algae

How to cite

Gogorev R. M., Pushina Z. V. 2011. Some centric diatoms (Bacillariophyta) from Neogene deposits of the Fisher Massif (Prince Charles Mountains, East Antarctica). Novosti sistematiki nizshikh rastenii 45: 32–49. https://doi.org/10.31111/nsnr/2011.45.32

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