Diatoms of North AmericaDiatoms of North America
Return to overview

Guide to Ulnaria goulardii

(Bréb. ex Cleve and Grunow) D.M.Williams, Potapova and C.E.Wetzel 2020

Synedra Goulardii Guide
Credit: Ian Bishop
  1. Mid-valve constriction
  2. Two rimoportula per valve
  3. "Ghost" striae in central area
  4. Parallel striae, becoming radiate at ends
  5. Shortened, interrupted striae bordering central area

Valves are distinctly constricted at mid-valve. Striae are parallel, becoming slightly radiate at the apices. "Ghost" striae may be present in the central area. Each valve has two rimoportula, one at either end, near the apices.

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