Spaulding, S.,
Edlund, M.
(2009).
Biremis.
In Diatoms of North America.
Retrieved November 21, 2024, from https://diatoms.org/genera/biremis
Symmetric Biraphid
Biremis
Valves with linear margins
Striae not continuous across valve face
Striae chambered, open externally in circular or slit-like foramina
Valve mantle with similar chambered striae
Biremis currently contains both freshwater and marine species. Freshwater species possess a linear margin and bilateral symmetry, while marine species are strongly dorsiventral, with amphoroid symmetry. The striae of Biremis appear to be "interrupted" (they are not continuous), due to internal plates that cover marginal chambered striae....