Diatoms of North AmericaDiatoms of North America
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Guide to Stauroneis sonyae

Kulikovskiy, Lange-Bert., Witkowski and Dorofeyuk 2010

Stauroneis Sonyae Guide
Credit: Loren Bahls
  1. Valves large, elliptic-lanceolate
  2. Apices narrow, subrostrate
  3. Axial area 3-4 times wider than raphe
  4. Stauros wide, bow tie shaped
  5. Proximal raphe ends curved and strongly dilated

Stauroneis sonyae has large elliptic-lanceolate valves with narrow subrostrate apices. The axial area is 3-4 times wider than the raphe. The stauros is very wide, shaped like a bow tie, and usually with short striae at the margins. Proximal raphe ends are curved and strongly dilated.