Compare Pinnularia alabamae
Compare
Pinnularia bihastata and P. rexlowei are both similar in valve outline. However, both taxa are much smaller.
Pinnularia bihastata has smaller spines located on each virga, has expanded central pores, and has longer internal openings of the alveoli. This last feature creates the appearance of a longitudinal line crossing striae close to axial area.
Pinnularia ectorii is slightly smaller, has less capitate apices, and lacks spines on the valve margin.
LM scalebar = 10 µm
Length Range
180-370 µm
180-370 µm
Width Range
32-48 µm
32-48 µm
Striae in 10 µm
5-6
5-6
Pinnularia ectorii
Length Range
185–335 µm
185–335 µm
Width Range
29–44 µm
29–44 µm
Striae in 10 µm
5–6 throughout the valve, up to 9 around central area
5–6 throughout the valve, up to 9 around central area