Valves of C. comensis are smaller, with a less regular radiate pattern in the central area. Valves of C. comta are nearly flat, rather than radially wrinkled, and the marginal striae occupy more than half of the valve radius. Cyclotella ocellata, C. polymorpha and Lindavia rossii have different patterns of ornamentation in the central area.
Diatoms of North America is running a fundraising campaign to keep the servers in operation. We need you to reach our $25,000 fundraising goal.
If you use and appreciate DONA, make your DONAtion today.
For the Gift Designation, type "diatom" in the search box and select "Diatom Lab Research Fund". This is the designated fund for diatoms.org.