Sullivan, M.,
Ashworth, M.,
Frankovich, T.
(2022).
Trieres.
In Diatoms of North America.
Retrieved February 06, 2025, from https://oldcraft3.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...