Eunotia triodon may be distinguished from other large species of Eunotia with dorsal undulations by its moderatly arched valves and a consistent three broadly rounded undulations on the dorsal margin. Eunotia semicircularis may also have three undulations, but they are deeper undulations than E. triodon. Note that the degree of undulation (broad vs. deep) may be more relevant to identification than the number of undulations in distinguishing taxa.
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.