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Magnolia Press, Phytotaxa, 3(437), p. 135-146, 2020

DOI: 10.11646/phytotaxa.437.3.2



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

Journal article published in 2020 by M. Luján García, Eduardo A. Morales, David G. Mann, Nora I. Maidana
Distributing this paper is prohibited by the publisher
Distributing this paper is prohibited by the publisher

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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.