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Category
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Class
Bacillariophyceae
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Order
Thalassiophysales
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Family
Catenulaceae
Sorted from smallest to largest by maximum length
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Links
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Index Nominum Algarum
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DiatomBase
Kleindl, P.
(2022).
Tetramphora.
In Diatoms of North America.
Retrieved May 29, 2023, from https://diatoms.org/genera/tetramphora
Asymmetric Biraphid
Tetramphora
- Valve faces in single plane
- Striae composed of apically or transapically oriented areolae
- Dorsal central area hyaline
Cells are elliptic. Frustules are strongly asymmetric, so that both valve faces lie in the same plane. Valves are moderately to strongly dorsiventral.
The raphe is biarcuate. The proximal raphe ends are ventrally deflected, but they may be obscured by a hyaline area. The hyaline area may give the appearance of dilated to undulate...