Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal
| dc.contributor.author | NOVAIS, MARIA HELENA | |
| dc.contributor.author | JÜTTNER, INGRID | |
| dc.contributor.author | VAN DE VIJVER, BART | |
| dc.contributor.author | MORAIS, MARIA MANUELA | |
| dc.contributor.author | HOFFMANN, LUCIEN | |
| dc.contributor.author | ECTOR, LUC | |
| dc.contributor.editor | Phytotaxa | |
| dc.date.accessioned | 2016-03-08T15:39:49Z | |
| dc.date.available | 2016-03-08T15:39:49Z | |
| dc.date.issued | 2015-08-28 | |
| dc.description.abstract | Two new taxa similar to Achnanthidium minutissimum were common and abundant in samples collected during a survey of benthic diatoms in watercourses from mainland Portugal. They are described here as A. duriense, sp. nov. and A. lusitanicum, sp. nov. In addition, the recently described A. pseudolineare is reported from various localities and its ecology is described in detail. The new Achnanthidium species from Portugal were compared with the type material of morphologically similar taxa: Achnanthidium microcephalum, Achnanthes minutissima, A. minutissima var. cryptocephala, A. minutissima var. inconspicua and A. nana. The analysis of these type material confirmed that Achnanthes minutissima var. cryptocephala should be regarded as a different taxon, and a new combination is proposed, Achnanthidium neocryptocephalum, stat., comb. et nom. nov. Achnanthes minutissima var. inconspicua is now considered as a younger synonym of Achnanthidium lineare. Based on a detailed morphological study of specimens of Achnanthes nana from Scotland, Nepal and Portugal, this taxon is transferred to the genus Achnanthidium as Achnanthidium nanum, comb. nov. | por |
| dc.description.sponsorship | This project was supported by Fundação para a Ciência e a Tecnologia—Portugal (PhD grant SFRH/BD/21625/2005), by the Fonds National de la Recherche du Luxembourg (grant AFR, PHD–09–120), by the Public Research Centre - Gabriel Lippmann (Luxembourg) within the framework of the projects FLORALIE and TAXODIA and by the Institute of Earth Sciences (ICT), under contract with FCT (the Portuguese Science and Technology Foundation). We gratefully acknowledge Delphine Collard (Luxembourg Institute of Science and Technology, Environmental Research and Innovation Department, Belvaux, Luxembourg) for technical assistance in preparation of the samples. Dr Jan Krokowski (Scottish Environment Protection Agency, Holytown) is acknowledged for providing the Scottish diatom samples containing Achnanthidium nanum and the respective chemistry measurements. For the loan of type material we thank the Botanical Garden & Museum, Copenhagen (Achnanthes minutissima var. inconspicua Østrup) and Lukas Taxböck, University of Zürich, Institute for Systematic Botany (Achnanthes nana F.Meister). | por |
| dc.identifier.authoremail | novaismh@gmail.com | |
| dc.identifier.authoremail | Ingrid.Juettner@museumwales.ac.uk | |
| dc.identifier.authoremail | vandevijver@br.fgov.be | |
| dc.identifier.authoremail | mmorais@uevora.pt | |
| dc.identifier.authoremail | lucien.hoffmann@list.lu | |
| dc.identifier.authoremail | luc.ector@list.lu | |
| dc.identifier.citation | Novais M.H., Jüttner I., Van de Vijver B., Morais M., Hoffmann L. & L. Ector (2015). Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal. Phytotaxa 224: 101-139 | por |
| dc.identifier.doi | doi.org/10.11646/phytotaxa.224.2.1 | por |
| dc.identifier.scientificarea | 591 | por |
| dc.identifier.sharewith | CGE/ICT | por |
| dc.identifier.uri | http://biotaxa.org/Phytotaxa/article/view/phytotaxa.224.2.1 | |
| dc.identifier.uri | http://hdl.handle.net/10174/17796 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Phytotaxa | por |
| dc.rights | restrictedAccess | por |
| dc.subject | Achnanthaceae | por |
| dc.subject | diversity | por |
| dc.subject | ecology | por |
| dc.subject | freshwater | por |
| dc.subject | nomenclature | por |
| dc.subject | taxonomy | por |
| dc.subject | ultrastructure | por |
| dc.title | Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal | por |
| dc.type | article | por |