Compare Pinnularia subcapitata var. elongata
Compare
Pinnualria subcapitata has a length to width ratio of less than 6 and a slightly more narrow axial area.
Pinnularia sinistra has less distinct rostrate apices.
Pinnularia mayeri has broader, more distinct capitate apices.
Pinnularia schroeterae has more radiate central striae, broader axial area, and more convex valve margins.
Pinnularia pisciculus var. angusta has more distinct, broadly rounded, subcapitate apices and larger valves.
Pinnularia gibbiformis lacks a transverse fascia.
Pinnularia microstauron var. tenuirostris has more protracted apices.
LM scalebar = 10 µm
Length Range
35-56 µm
35-56 µm
Width Range
5.7-6.2 µm
5.7-6.2 µm
Striae in 10 µm
11-13
11-13
