Compare Frustulia crassinervia
Compare
Frustulia inculta valve margins are very slighty undulate, a larger porte-crayon, and lower stria density.
Frustulia quadrisinuata has much broader apices and coarser valves.
Frustulia saxonica has less undulate margins and broader apices.
LM scalebar = 10 µm
Length Range
34.5-48.0 µm
34.5-48.0 µm
Width Range
9.0-10.5 µm
9.0-10.5 µm
Striae in 10 µm
33-35 in the center
33-35 in the center
Frustulia inculta
Length Range
54-74 µm
54-74 µm
Width Range
11.5-14.0 µm
11.5-14.0 µm
Striae in 10 µm
28-30 in the center valve, 27-28 at the ends
28-30 in the center valve, 27-28 at the ends
