Abstract
In this paper two species of the genus Gomphonema from Salto del Guayabo, eastern Cuba, are described as new: Gomphonema guayabense sp. nov. and G. curatorum sp. nov. Both are characterized by a broad combined axial/central area bordered by short transapical striae and the lack of an isolated pore or stigmoids respectively. Detailed morphological descriptions based on light- and scanning-electron microscopy are presented. LM and SEM micrographs show the size ranges and ultramicroscopical details of the new species. In addition, similar taxa and distinctive features are discussed. The new taxa support a statement by Foged (1984) that the freshwater diatom flora of Cuba is poorly known thus far.