Cyclotella Bodanica Intermedia Guide
Credit: Will Daniels
  1. Stria density 11-13 in 10 µm
  2. Central area ~1/3 of total diameter
  3. Areolae in central area random to slightly-radial
  4. Rimoportulae 2-3

The central area is about 1/3 of the total diameter. In the central area, the fultoportulae and areolae are usually arranged randomly, although they may be slightly radial. Stria density is 11-13 in 10 µm. Two or three equally-spaced, or slightly unevenly-spaced, rimoportulae are located at the central ends of shortened striae.