Compare Frustulia crassinervia
Frustulia inculta is slighty undulate, with a larger porte-crayon and lower stria density.
Frustulia quadrisinuata has 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
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
Length Range
58.0-67.0 µm
58.0-67.0 µm
Width Range
14.0-15.0 µm
14.0-15.0 µm
Striae in 10 µm
30-31
30-31
Length Range
46.5-87.5 µm
46.5-87.5 µm
Width Range
12.5-17.5 µm
12.5-17.5 µm
Striae in 10 µm
30-33
30-33
