Diatoms of North AmericaDiatoms of North America
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Compare Caponea caribbea

Podzorski 1984

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Fallacia subhamulata has a robust, linear conopeum that covers the middle half of the valve and obscures the axial area. It has a narrower and more circular central area, with weakly radiate striae.

Fallacia tateyamensis has a finely porous conopeum. The valves are more broadly elliptic, with broadly rounded apices and slightly radiate striae.

LM scalebar = 10 µm
Caponea caribbea LM1 Caponea caribbea LM2 Caponea caribbea LM5 Caponea caribbea LM3 Caponea caribbea LM4 Caponea caribbea LM6 Caponea caribbea LM7
Length Range
18-28 µm
Width Range
6.6-9 µm

Fallacia subhamulata

(Grunow in Van Heurck) D.G.Mann in Round et al. 1990

Fallacia subhamulata LM4 Fallacia Subhamulata15603B 12032015 04 Cl Fallacia subhamulata LM3 Fallacia subhamulata LM5 Fallacia subhamulata LM2 Fallacia subhamulata LM6 Fallacia subhamulata LM1
Length Range
15.0-17.3 µm
Width Range
5.6-6.0 µm
Striae in 10 µm
28-31

Also compare to

Fallacia tateyamensis

Y.Li and H.Suzuki 2022