Fernandes, L.F. Procopiak, L.K. <br/><br/>
Observations on valve structure of Navicula directa (Wm. Smith)Ralfs in pritchard and Navicula glaciei V. Heurck from rocky substrates in Antartic peninsula 

<br/><br/><label>Subjects--Topical Terms: </label><br/>ALGA<br/>TAXONOMIA VEGETAL<br/>MICROALGA<br/>MORFOLOGIA VEGETAL