Diatoms of North AmericaDiatoms of North America
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Compare Fallacia hummii

(Hustedt) D.G.Mann 1990

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Fallacia californica also has a distinct lyre-shaped canals, uniseriate striae, and a straight raphe. However, F. californica valves are much smaller (6–15 µm in length) and are less broad and the striae are parallel.

LM scalebar = 10 µm
Fallacia Hummii Lm5 Fallacia Hummii Lm3 Fallacia Hummii Lm6 Fallacia Hummii Lm1 Fallacia Hummii Lm7 Fallacia Hummii Lm4 Fallacia Hummii Lm2
Length Range
16-29 µm
Width Range
11-20 µm
Striae in 10 µm
11-12

Fallacia californica

Stancheva and Manoylov 2018

Fallacia Californica Swamp 404 S 25668 004 Fallacia Californica Swamp 404 S 25668 003 Fallacia Californica Swamp 404 S 25668 001 Fallacia Californica Swamp 404 S 25668 002 Fallacia Californica Swamp 404 S 25668 005
Length Range
6–15 µm
Width Range
3.5–5.6 µm
Striae in 10 µm
20-23