Jüttner, I.,
Spaulding, S.
(2012).
Oricymba.
In Diatoms of North America.
Retrieved May 01, 2026, from https://diatoms.org/genera/oricymba?x-craft-preview=409442409a997390693ff24c7010fd6f1c96fb56f8f091fa016a63de9a54aaccecpiqubknd
Asymmetric Biraphid
Oricymba
Marginal ridge present
Areolae slit-like
Areolae with dentate projections
SPECIES OF ORICYMBA ARE NOT KNOWN TO OCCUR IN NORTH AMERICA
This genus has slightly dorsiventral, or nearly symmetric, valves. The valve face is flat and is separated from the valve mantle by a marginal ridge. A distinct, isolated stigma is present, located between the central nodule and the ventral striae. The raphe is slightly lateral....