An evaluation of selected Neidium species from the Antarctic Region

The presentation of three distinct Neidium taxa from the sub-Antarctic and Maritime Antarctic Region after examining more than 1500 samples from a broad variety of aquatic and terrestrial habitats and microhabitats suggests that taxa representing the genus Neidium are not only quite rare in these re...

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Bibliographic Details
Published in:Diatom Research
Main Authors: Hamilton, P. B., De Haan, M., Kopalová, K. (Kateřina), Zidarova, R., Van de Vijver, B.
Format: Article in Journal/Newspaper
Language:English
Published: 2014
Subjects:
Bacillariophyta
biogeography
Neidium
Antarctic
The Antarctic
Antarc*
Online Access:https://doi.org/10.1080/0269249X.2013.822020
http://hdl.handle.net/11104/0237433
Description
Summary:The presentation of three distinct Neidium taxa from the sub-Antarctic and Maritime Antarctic Region after examining more than 1500 samples from a broad variety of aquatic and terrestrial habitats and microhabitats suggests that taxa representing the genus Neidium are not only quite rare in these regions, but that the three species also represent well-defined biogeographical distributions. Neidium nyvltii sp. nov., N. antarcticum sp. nov. and N. aubertii are characterized by linear to linear-lanceolate valves with rostrate to capitate apices, a single prominent longitudinal canal along the valve margins and lacinia at the distal raphe fissures. There is some evidence of parallel similarities in valve forms between the polar northern Hemisphere and the polar Southern Hemisphere. The significance of this parallelism is yet to be determined.

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