![Sample our Environment & Agriculture journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5934/TOC-Subject-Sample-2021-Environment-Agriculture.jpg"})
Abstract
Two hyaline diatoms found in marine sandy beaches are studied from the Brazilian coast. The study reports Hyaloneis hyalinum with a fine valve structure, morphology and dimensions in agreement with its original diagnosis. New morphological data on the genus Pravifusus are presented with a description of a new species, Pravifusus brasiliensis. The diagnostic features of this new species are the cingulum composed of thin open bands, the chain formation and the spines visible in light microscopy, and the apical pore field organized in rows of few poroids and bifurcated spines in scanning electron microscopy.
Acknowledgements
The author thanks Márcio Tamanha, Adriano Marenzi, Leonardo Rubi Rörig and Fernando Diehl at Universidade do Vale do Itajaí (UNIVALI) for the laboratory facilities and field trips arrangements; the Electron Microscopy Center of the Federal University of Rio Grande do Sul and Karina Marckmann for technical assistance on the SEM. This work was partially supported by CNPq 301299/2000-5 and 301897/2003-4.