Compare Fallacia tenera | Species - Diatoms of North America

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Fallacia tenera is similar in size and striae structure to Fallacia californica. However, F. californica has finer striae (more than 20 in 10 µm), slightly smaller valves, distinct panduriform lyre-shaped hyaline area, asymmetric central area surrounded by variable central striae and two well developed rows of areolae on both sides the raphe branches. Fallacia tenera differs from other freshwater small-sized species with distinct panduriform lyre, such as F. cryptolyra and F. sublucidula, as F. tenera is distinguished by its coarse areolae resolvable with LM. Navicula hodgeana has striae that are more fine.

LM scalebar = 10 µm

Fallacia Tenera 901 M14126 2

Fallacia Tenera 901 M14126

Fallacia Tenera 519 Ps0765 04132016 02

Fallacia Tenera 519 Ps0765 04132016 03

Length Range
9.4-15 µm

Width Range
4.5-7 µm

Striae in 10 µm
16-21

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

Navicula hodgeana

R.M.Patrick and Freese 1961

Navicula hodgeana LM3

Navicula hodgeana LM2

Navicula hodgeana LM1

Length Range
15–19 µm

Width Range
5–7 µm

Striae in 10 µm
16–20

Also compare to

Fallacia cryptolyra

BioData Reference
Krammer and Lange-Bertalot 2/1 Pl 65 Fig 7-9

Fallacia sublucidula

BioData Reference
Krammer and Lange-Bertalot 2/1 Pl 66 Fig 40-42

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