Compare Frustulia soror
Compare
The apices of F. soror are slightly constricted as compared to the capitate or subcapitate apices of F. capitata. The ventral longitudinal rib of F. soror is complete, unlike that found in F. latita. The longitudinal ribs of F. weinholdii are incomplete on both sides of the valve, and it has a lower stria density (30-33 in 10 µm).
LM scalebar = 10 µm
Length Range
28.5-52.0 µm
28.5-52.0 µm
Width Range
7.5-9.5 µm
7.5-9.5 µm
Striae in 10 µm
34-36 at the center, 35-37 at the ends
34-36 at the center, 35-37 at the ends
Frustulia creuzburgensis
Length Range
26.0-38.0 µm
26.0-38.0 µm
Width Range
6.0-8.0 µm
6.0-8.0 µm
Striae in 10 µm
24-26 at the center, 28-30 at the ends
24-26 at the center, 28-30 at the ends
Frustulia latita
Length Range
32.0-48.0 µm
32.0-48.0 µm
Width Range
8.0-10.0 µm
8.0-10.0 µm
Striae in 10 µm
30-32 at the center, 33-35 at the ends
30-32 at the center, 33-35 at the ends
Frustulia capitata
Length Range
26.0-43.0 µm
26.0-43.0 µm
Width Range
7.0-8.5 µm
7.0-8.5 µm
Striae in 10 µm
34-36 at the center, 35-38 at the ends
34-36 at the center, 35-38 at the ends
Also compare to
Frustulia weinholdii
BioData Reference
Lange-Bertalot 2001 Pl 133 Fig 5-7