Diatoms of North AmericaDiatoms of North America
Return to overview

Guide to Ulnaria delicatissima

(W.Sm.) Aboal and Silva 2004

Ulnaria Delicatissima Guide
  1. Valves linear, narrow
  2. Apices protracted and rostrate
  3. Apices rounded
  4. Central area elliptic, usually with ghost striae

Valves narrow and linear or gradually tapering to protracted rostrate apices. Central area present, often with ghost striae and short striae at the margins.