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Category
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Class
Mediophyceae
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Order
Eupodiscales
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Family
Parodontellaceae
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
Sullivan, M.,
Ashworth, M.,
Frankovich, T.
(2022).
Trieres.
In Diatoms of North America.
Retrieved May 29, 2023, from https://diatoms.org/genera/trieres
Centric
Trieres
- Colonies joined by 4 processes from each cell
- Rimoportulae with long external tubes
- Plastids numerous, discoid
- Apices with ocelli
- Areolae hexagonal, loculate
Frustules are bipolar, rectangular in girdle view with four tubular processes arising obliquely from an undulate valve surface. Valves with a diagonal symmetry, elliptic-lanceolate to lanceolate in outline. Valve face linear to lanceolate, separated from a tall, deeply sloped mantle by a crenulated or smooth ridge that is uninterrupted...