Amphora bicapitata, Halamphora normanii, and H. latecostata are larger in size. Halamphora tenerrima is similar in size and shape, but has finer striae (up to 28 in 10 µm). Amphora tenuissima has smaller valves.
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.