Diatoms of North AmericaDiatoms of North America
Return to overview

Guide to Planothidium potapovae

C.E.Wetzel and Ector 2019

Planothidium Rostratum Guide
Credit: Marina Potapova
  1. Valves lanceolate-elliptic with rostrate or narrowly subcapitate apices
  2. Valves 5.0-6.0 μm wide
  3. Rapheless valve with a cavum
  4. Axial area on rapheless valve from narrow linear to expanded in the center
  5. Central area on raphe valve transeversely rectangular

Valves are lanceolate-elliptic with rostrate or narrowly subcapitate apices, 11.0-17.5 μm long, 5.0-6.0 μm wide. The rapheless valve has a linear axial area, which widens in the center. The central area on the rapheless valve is asymmetric and contains a cavum. The central area on raphe valve is wide, and transversely rectangular.

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.

Donate today