Navicula Rhynchocephala Guide
Credit: Pat Kociolek
  1. Valves lanceolate
  2. Apices elongate-protracted, rounded
  3. Central striae widely spaced
  4. Striae distinctly lineate

Valves are lanceolate with elongate-protracted, rounded apices. The axial area is narrow, straight, widening to form an irregularly-rounded to elliptical central area. The central area formed by shortened striae that are also more widely spaced than elsewhere on the valve. The striae are distinctly lineate, radiate around the center, becoming parallel, then convergent at the ends.

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.