Frankovich, T.
(2022).
Guinardia.
In Diatoms of North America.
Retrieved November 21, 2024, from https://diatoms.org/genera/guinardia
Centric
Guinardia
Frustules lightly-silicified, delicate
Cells joined in chain-like colonies
Valves with shallow valve mantle
Copulae numerous, ligulate
Frustules are joined in colonies to form straight or curved chains. The connection between frustules is weak and formed by joining of the external process of a rimoportula with a depression on the valve face of the adjacent frustule. Valves are circular, with very shallow mantles and numerous ligulate copulae. The length of the pervalvar...