Nitzschia imae sp. nov. (Bacillariophyta, Nitzschiaceae) from Iceland, with a redescription of Hannaea arcus var. linearis

From field-collected samples, two Icelandic diatom species were studied under light and electron microscopy, resulting in a newly described species and an emended description with a nomenclatural status change. A discussion on the morphological features of these taxa and their taxonomic affinities w...

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Bibliographic Details
Published in:Anales del Jardín Botánico de Madrid
Main Authors: Irene Álvarez-Blanco, Saúl Blanco
Format: Article in Journal/Newspaper
Language:English
Spanish
Published: Consejo Superior de Investigaciones Científicas 2013
Subjects:
Online Access:https://doi.org/10.3989/ajbm.2358
https://doaj.org/article/791cf2d397f8490a9d9382752ab702a6
Description
Summary:From field-collected samples, two Icelandic diatom species were studied under light and electron microscopy, resulting in a newly described species and an emended description with a nomenclatural status change. A discussion on the morphological features of these taxa and their taxonomic affinities with related species is presented. Nitzschia imae is described from Blue Lagoon, south-west Iceland. The main diagnostic criteria include the presence of two differences morphotypes, one with obtusely rounded apices and the other with slightly asymmetrical valve outline and broadly rounded apices. Additionally, we propose an emended description for Hannaea arcus var. linearis since there is no concordance between morphometric features in the protologue and the type illustration.