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Category
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Class
Bacillariophyceae
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Order
Eunotiales
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Family
Eunotiaceae
Sorted from smallest to largest by maximum length
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Spaulding, S.,
Edlund, M.
(2009).
Amphorotia.
In Diatoms of North America.
Retrieved June 08, 2023, from https://diatoms.org/genera/amphorotia
Eunotioid
Amphorotia
- Valves slightly, to stongly, asymmetric to the apical axis
- Valve symmetric to transapical axis
- Rimoportulae two per valve
- Sternum on valve face
- Valves greater than 60 µm in length
Valves of Amphorotia are large in size, generally greater than 60 µm in length. The valves are asymmetric to the apical axis and symmetric to the transapical axis. In addition, the frustules are asymmetric to the transapical plane, so that the dorsal mantle is very broad as compared to the ventral mantle. Each valve has two rimoportulae,...