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 (in the section Lineolatae 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
Lineolate striae of Navicula capitatoradiata (SEM), as are the striae of all the true Navicula.
Image Credit: Marina Potapova
Valve of Navicula tripunctata (SEM). The arrow depicts one lineolate areola. These areolae are elongated in the apical direction, which is a characteristic of the genus Navicula. The areolae are arranged in rows to form the striae of the valve.
Image Credit: Marina Potapova
Lineolae are visible in these striae of Navicula germainii (LM). The lineolae of some Navicula species are visible in LM but difficult, or not possible, to discern in others.