Transfer of the Antarctic diatom Nitzschia barbieri (Bacillariophyta) to the genus Fragilariopsis and emended descriptions of F. barbieri comb. nov. and F. peragallii

• Published in: Polar Biology
• Main Authors: Cefarelli, Adrián Oscar, Ferrario, Martha Elba, Vernet, Maria, Campana, Gabriela Laura, Lundholm, Nina
• Format: Article in Journal/Newspaper
• Language: English
• Published: Springer
• Subjects: ANTARCTICA; DIATOM; FRAGILARIOPSIS; FRAGILARIOPSIS BARBIERI; FRAGILARIOPSIS PERAGALLII; NITZSCHIA; SEA ICE; https://purl.org/becyt/ford/1.6; https://purl.org/becyt/ford/1; Antarctic; The Antarctic; Austral; Patagonia; San Juan; Argentino; Argentina; Doublets; Antarc*; Antarctica; Dirección Nacional del Antártico; Instituto Antártico Argentino; Polar Biology; Sea ice
• Online Access: http://hdl.handle.net/11336/164736

Fragilariopsis is a marine diatom genus that has a critical ecological role in Antarctic waters due to its high abundance and ubiquity in plankton and sea ice. Several species of Fragilariopsis are used extensively in paleoceanography due to their good preservation in marine sediments. Detailed morphological studies on Fragilariopsis species from Antarctic water and ice samples were thus performed. Nevertheless, some species of this genus still remain poorly studied. Based on close morphological similarity between the valve structure of the Antarctic diatom Nitzschia barbieri and the genus Fragilariopsis, we propose transferring N. barbieri to Fragilariopsis as Fragilariopsis barbieri comb. nov. The description of the two rarely reported species, F. barbieri and F. peragallii, were emended. The girdle structure and the formation of doublets in F. barbieri and F. peragallii are described and illustrated for the first time. The analyses were carried out by light and electron microscopy and complete the morphological description of the fourteen known extant taxa of Fragilariopsis from Antarctica. Relative abundance of Fragilariopsis species from sea ice is also presented. Fil: Cefarelli, Adrián Oscar. Universidad Nacional de la Patagonia Austral. Centro de Investigaciones y Transferencia Golfo San Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia Golfo San Jorge. Universidad Nacional de la Patagonia "San Juan Bosco". Centro de Investigaciones y Transferencia Golfo San Jorge; Argentina Fil: Ferrario, Martha Elba. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Ficología; Argentina Fil: Vernet, Maria. University of California at San Diego; Estados Unidos Fil: Campana, Gabriela Laura. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de ...