Diatoms of North AmericaDiatoms of North America
Return to overview

Guide to Brachysira hannae

(Reimer) Lange-Bert. and Moser 1994

Brachysira Hannae Guide
Credit: Paul Hamilton
  1. Rhombic valve with straight sides
  2. Length to width ratio 2:1 to 3:1
  3. Alternating long and short striae near the central area

Valves are rhombic with straight margins. The valve length is two to three times the valve width. Within each stria, the orientation and irregular size of the areolae creates a wavy appearance of the striae. Striae at the center valve margin are short, and not interrupted.

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