portrait

Descrição:

Navicula (na-vick-you-la), small to medium pennate diatom, common in sediments. With browny coloured plastid located around the edges of the cell. Refractile globules are lipid inclusions. The cell is located within a shell (frustule) made of silica (glass) and the patterns of pores and strengthening elements is used to distinguish different taxa. Differential interference contrast.