Diatoms of North AmericaDiatoms of North America
Return to overview

Guide to Rossithidium pusillum

(Grunow) Round and Bukht. 1996

R Pusillum Guide
Credit: Marina Potapova
  1. Valve linear to linear-elliptical
  2. Raphe straight, without distinct terminal raphe fissures
  3. Striae unseriate, slightly radiate throughout both valves
  4. One or two striae in the center of the raphe valve more broad than the other striae

Valves are linear to linear-elliptical or linear-lanceolate with rounded ends. The terminal raphe fissures are not distinct. The striae are uniseriate, with 4-5 areolae per stria, and slightly radiate throughout both valves.

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