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.
Undulate
Undulate describes a feature as having the shape of a wave, with crests and troughs. A valve may be undulate on the margins or on the face.
Image Credit: Sarah Spaulding, Elizabeth Ruck
Image Credit: Sarah Spaulding, Elizabeth Ruck
Light micrographs of Cymatopleura. On the left, a frustule in girdle view shows the undulations characteristic of the genus. On the right, the undulations are visible in valve view.