Diatoms of North AmericaDiatoms of North America
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Compare Navicula hodgeana

R.M.Patrick and Freese 1961

Compare

There are many small Fallacia and Pseudofallacia species which should be compared to this taxon. Navicula hodgeana is similar to F. subhamulata in shape and size, but may be distinguished by the single row of areolae adjacent to the axial area, the more widely spaced striae and the elevated, curved axial area. Pseudofallacia losevae has a similar axial area, but has an elliptic to lanceolate valve with radiate striae and a distinct central area. Fallacia dithmarsica and F. tenera have similar punctate striae, but the elliptic valve shape, more lyrate hyaline region on the valve face and 2–3 areolae in each stria along the valve margin are unique.

LM scalebar = 10 µm
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

Fallacia tenera

(Hust.) D.G.Mann in Round et al. 1990

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

Also compare to

Fallacia dithmarsica

(König) D.G.Mann

Fallacia subhamulata

(Grunow) D.G.Mann

Pseudofallacia losevae

Lange-Bert., Genkal and Vechov