Pseudostaurosira Parasitica Guide
Credit: Eduardo Morales
  1. Valves lanceolate
  2. Axial area broad and lanceolate
  3. Striae short
  4. Spines absent
  5. Apical pore fields recessed

Frustules are lanceolate with rostrate to subcapitate ends. Axial area broadly lanceolate. The striae are short, restricted to the valve margins. Apical pore fields are present at both apicies and are well developed. Under the SEM, the pore fields can be observed to be recessed below the valve surface.