Compare Frickea lewisiana
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Frickea can be distinguished from Frustulia by its very long, rib-like helictoglossa, longitudinal ribs that extend to but do not fuse with the helictoglossa, and the large T-shape of all four external raphe endings.
LM scalebar = 10 µm
Length Range
255.0-265.0 µm
255.0-265.0 µm
Width Range
45.0 µm
45.0 µm
Striae in 10 µm
22-24
22-24