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Guide to Pinnularia ectorii

Potapova, Aycock and Kersey 2023

Pinnularia ectorii guide
  1. Valves large
  2. Valves linear-lanceolate with central inflation
  3. Apices subcapitate to capitate
  4. Longitudinal lines transect striae

Valves are linear-lanceolate, with a central inflation and rounded subcapitate to capitate apices. The axial area is linear-lanceolate, approximately 1/3 of the valve width. The central area is round or elliptic and asymmetric. The raphe is lateral.  Longitudinal lines transect striae in the middle of the valve.