Diatoms of North AmericaDiatoms of North America
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Compare Navicula cryptocephaloides

Hust. 1937

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Valves of N. subrhynchocephala are linear-lanceolate with rostrate to subcapitate apices. Proximal raphe ends of N. subrhynchocephala are deflected to the secondary side of the valve, not straight. Navicula cryptocephaloides has narrower valves and higher stria and areola densities than N. bourellyivera.

LM scalebar = 10 µm
Navicula cryptocephaloides LM7 Navicula cryptocephaloides LM6 Navicula cryptocephaloides LM5 Navicula cryptocephaloides LM4 Navicula cryptocephaloides LM3 Navicula cryptocephaloides LM2 Navicula cryptocephaloides LM1
Length Range
25-54 µm
Width Range
7.3-9.7 µm
Striae in 10 µm
13-14

Navicula subrhynchocephala

Hust. 1935

Navicula subrhrynchocephala LM6 Navicula subrhrynchocephala LM7 Navicula subrhyncocephala LM4 Navicula subrhynchocephala LM2 Navicula subrhynchocephala LM1 Navicula subhynchocephala LM3 Navicula subrhrynchocephala LM5
Length Range
29-42 µm
Width Range
7.5-8.9 µm
Striae in 10 µm
12-14

Also compare to

Navicula bourellyivera

Lange-Bert., Witkowski and Stachura