Compare Frustulia amphipleuroides
Frustulia inculta has parallel striae at the apices. In addition, the central nodule of F. amphipleuroides is generally much more elongate than that of F. inculta. Frustulia quadrisinuata has noticeably undulate margins.
LM scalebar = 10 µm
Length Range
63.0-97.0 µm
63.0-97.0 µm
Width Range
15.0-16.5 µm
15.0-16.5 µm
Striae in 10 µm
23-25 in the center, 25-26 at the ends
23-25 in the center, 25-26 at the ends
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
