Diatoms of North AmericaDiatoms of North America
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Compare Humidophila contenta

(Grunow) Lowe et al. 2014

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Humidophia paracontenta has a lower stria density.

Humidophila undulata has an undulate valve margin, as compared to the concave or convex margins of H. contenta.

LM scalebar = 10 µm
Humidophila contenta LM1 Humidophila contenta LM3 Denewcas63 Housecreek23 Humidophila contenta LM5 Denewcas3B
Length Range
6.0-12.1 µm
Width Range
2.4-2.6 µm
Striae in 10 µm
36-38

Humidophila undulata

Lowe et al. 2014

Humidophila undulata LM5 Humidophila undulata LM6 Humidophila undulata LM3 Humidophila undulata LM1 Humidophila undulata LM7 Humidophila undulata LM2 Humidophila undulata LM4
Length Range
8.8-11.2 µm
Width Range
2.7-3.0 (broadest point), 1.9-2.4 (center) µm
Striae in 10 µm
28-30

Also compare to

Humidophila paracontenta

(Lange-Bert. and Werum) Lowe et al.