Glossary
Like the rest of this website, the glossary is a work in progress. If we’ve missed a term, please contact us to let us know the term and references.
Lineola
A lineola is an areola that is elongated in the apical direction. In Latin, lineola means "little line". The plural is lineolae.
Lineolae compose the striae of the genus Navicula sensu stricto, or the Lineolate section of Navicula. This type of stria is called a lineolate stria.
Image Credit: Marina Potapova
Image Credit: Marina Potapova
Image Credit: Marina Potapova
Image Credit: Marina Potapova
The striae of Navicula capitatoradiata are lineolate, as are the striae of all the true Navicula.
Image Credit: Marina Potapova
Areolae are often aligned in rows to form striae. In the genus Navicula, the areolae are elongated in the apical direction forming lineolate striae. This image shows the lineolate striae of N. tripunctata in SEM.
Image Credit: Marina Potapova
The lineolate striae of Navicula species are visible in the light microscope in some species, but difficult, or not possible, to discern in others. Here, the lineolate striae of Navicula germainii can be seen.