Diatoms of North AmericaDiatoms of North America
Return to overview

Guide to Gomphonema sarcophagus

W.Greg. 1856

Gomphonema Sarcophagus Guide
Credit: Jeremy Walls
  1. Valve linear- to elliptic-lanceolate
  2. Headpole rostrate
  3. Striae slightly radiate
  4. Stigmoid present
  5. Forms Janus cells

Valves are linear- to elliptic-lanceolate. The headpole is rostrate. Striae are slightly radiate and irregularly spaced. Janus cells may be present, frustules that have valves of differing morphologies, often of differing stria densities. One to two shortened striae are present in the central area. A single stigmoid is present.