Polaskey, M.,
Bishop, I.
(2018).
Grunowia.
In Diatoms of North America.
Retrieved April 12, 2026, from https://diatoms.org/genera/grunowia
Nitzschioid
Grunowia
Raphe eccentric
Striae punctate
Fibulae large
Valves have an eccentric raphe, positioned on a keel. Striae are punctate. Fibulae are large and distinct.
The genus Grunowia was established by Rabenhorst (1864) to accommodate two species of nitzschioid diatoms with an undulate valve margin and dorsally connected fibulae extending half-valve, including Denticula sinuata
Thwaites in...