Spaulding, S.,
Edlund, M.
(2008).
Distrionella.
In Diatoms of North America.
Retrieved May 01, 2026, from https://diatoms.org/genera/distrionella?x-craft-preview=cab8b13ef68d1e257235fd2491770f51dfe0c9a6c0ad3b95411776e5316d603alxhbyabypv
Araphid
Distrionella
Valves elongated, ends capitate ends
Striae unevenly spaced
Rimoportula single, often central within a stria near one pole
Frustules of Distrionella are elongated with capitate ends. Valves may be slightly asymmetric to the transapical axis. Striae are unevenly spaced and become scattered and more irregular at the valve ends. Transapical ribs often evident. A central sternum is absent. Porefields, composed of simple porelli, are present at both valve ends....