Congote, L.
(2022).
Nanofrustulum.
In Diatoms of North America.
Retrieved October 14, 2024, from https://diatoms.org/genera/nanofrustulum
Araphid
Nanofrustulum
Copulae scale-like (quasifract)
More than two areolae in a stria
Marginal linking spines present
Valves circlular to slightly oval
This genus shares many of its characters with the genus Pseudostaurosira, yet, the following combination of characters distinguishes Nanofrustulum.
Frustules are linked by marginal spines in a face-to-face manner, forming short chains. The valve face is flat to slightly domed, circular to slightly oval, with a vertical mantle. In girdle...