Diatoms of North AmericaDiatoms of North America
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Compare Navicula pseudolanceolata

Lange-Bert. 1980

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Navicula lanceolata has broader apices, a larger and more regular central area, and finer areolae. Terminal striae are convergent.

Navicula subconcentrica has more attenuated apices and more closely set proximal raphe ends.

Navicula flatheadensis has larger valves, weakly protracted apices in smaller specimens, striae that are bent near the central area and parallel to weakly convergent at the apices.

LM scalebar = 10 µm
Navicula pseudolanceolata LM7 Navicula pseudolanceolata LM6 Navicula pseudolanceolata LM5 Navicula pseudolanceolata LM4 Navicula pseudolanceolata LM3 Navicula pseudolanceolata LM2 Navicula pseudolanceolata LM1
Length Range
41-59 µm
Width Range
9.0-11.1 µm
Striae in 10 µm
9-11

Navicula flatheadensis

Bahls 2011

Navicula flatheadensis LM6 Navicula flatheadensis LM5 Navicula flatheadensis LM4 Navicula flatheadensis LM3 Navicula flatheadensis LM2 Navicula flatheadensis LM1
Length Range
45-75 µm
Width Range
10.3-13.5 µm
Striae in 10 µm
10-12

Navicula lanceolata

(C.Agardh) Ehrenb. 1838

Navicula lanceolata LM3 Navicula lanceolata LM7 Navicula lanceolata LM2 Navicula lanceolata LM6 Navicula lanceolata LM4 Navicula lanceolata LM1 Navicula lanceolata LM5
Length Range
30-60 µm
Width Range
9–12 µm
Striae in 10 µm
10–13

Navicula subconcentrica

Lange-Bert. 2001

Navicula subconcentrica LM7 Navicula subconcentrica LM6 Navicula subconcentrica LM5 Navicula subconcentrica LM4 Navicula subconcentrica LM3 Navicula subconcentrica LM2 Navicula subconcentrica LM1
Length Range
36-58 µm
Width Range
8.5-10.6 µm
Striae in 10 µm
10-12