Achnanthes subhudsonis var. krauselii is very small, and might be confused with Microcostatus krasskei. The frustules of A. subhudsonis var. krauselii, however, are distinctive because of the widely spaced, radiate striae on the raphe valve.
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.