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Type: Article
Published: 2020-03-26
Page range: 135–146
Abstract views: 27
PDF downloaded: 2

Sellaphora mayrii (Bacillariophyceae), a new diatom from the Argentinean Patagonia

Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Buenos Aires, Argentina. CONICET. Instituto de Biodiversidad y Biología Experimental Aplicada (CONICET – UBA). Buenos Aires, Argentina
Water Laboratory, University of Évora, P.I.T.E. Rua da Barba Rala No. 1, 7005–345 Évora, Portugal Institute of Earth Sciences - ICT, University of Évora, Rua Romão Ramalho 59, 7000–671 Évora, Portugal
Royal Botanic Garden Edinburgh, Edinburgh, EH3 5LR, Scotland, UK 6Institute for Food and Agricultural Research and Technology (IRTA), Crta de Poble Nou Km 5.5, E-43540 Sant Carles de la Ràpita, Catalunya, Spain
Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Buenos Aires, Argentina. CONICET. Instituto de Biodiversidad y Biología Experimental Aplicada (CONICET – UBA). Buenos Aires, Argentina
diatoms freshwater Sellaphora South America taxonomy Algae

Abstract

A new species of Sellaphora was found in modern and fossil sediments from shallow-lake Laguna Gemelas Este, Santa Cruz, Argentina. The new taxon was studied with light microscopy and scanning electron microscopy. We present a detailed analysis of its morphology, supporting its placement in the genus Sellaphora Mereschkowsky, and report the physico-chemical characteristics of the lake where it was found. Sellaphora mayrii sp. nov. is most similar to S. smirnovii Chudaev & Gololobova, a small-celled species first reported from Russia. Both species have in common the valve outline, but the new species from Argentina has a wider size range and, when observed with electron microscopy, is visibly different regarding stria pattern, central area, and shape of the areolae.