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.
Ringleist
A ringleist is an internal, silica ledge that projects into the cell interior from the collum. The ringleist is found only in the genus Aulacoseira and is variously developed in different species of the genus. Note that some authors use the German spelling, ringleiste.
Alternative Terms
- sulcus
The term sulcus is sometimes used, particularly with *Aulacoseira ambigua*. The hollow ringliste may also be called a 'U-shaped sulcus'. See the illustration on this page.
Image Credit: Marina Potapova
Image Credit: Marina Potapova
Image Credit: Marina Potapova
Image Credit: Marina Potapova
Light micrograph of the well developed and prominent ringleist of Aulacoseira lirata at the arrow.
Image Credit: Marina Potapova
Scanning electron micrograph of the characteristic, hollow ringleist of Aulacoseira ambigua.
Image Credit: Marina Potapova
Scanning electron micrograph of the internal mantle of Aulacoseira alpigena with a distinct ringleist.