Diatoms of North AmericaDiatoms of North America
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Compare Diatoma ehrenbergii

Kütz. 1844

Compare

Diatoma ehrenbergii distinguished from D. vulgaris, D. tenuis and D. moniliformis primarily by valve outline. Diatoma vulgaris has elliptic to elliptic-lanceolate valves. Diatoma tenuis has more narrow valves (width 2.9-4.9 µm), although small valves of D. ehrenbergii are wider than small valves of D. tenuis. Diatoma moniliformis is smaller in range of length and width, and has rounded to rostrate apices.

LM scalebar = 10 µm
Diehrenbergii 9 Diehrenbergii 8 Diehrenbergii 1 Diehrenbergii 2 Diehrenbergii 4 Diehrenbergii 6 Diehrenbergii Nyc
Length Range
31-121 µm
Width Range
4.5-9.3 µm
Striae in 10 µm
35-40

Diatoma vulgaris

Bory 1824

Diatoma vulgaris LM4 Diatoma vulgaris LM3 Diatoma vulgaris LM5 Diatoma vulgaris LM1 Diatoma vulgaris LM2
Length Range
15-60 µm
Width Range
8–12 µm
Striae in 10 µm
50-60

Diatoma tenuis

C.Agardh 1812

Diatoma tenuis LM7 Diatoma tenuis LM6 Diatoma tenuis LM4 Diatoma tenuis LM5 Diatoma tenuis LM1 Diatoma tenuis LM3 Diatoma tenuis LM2
Length Range
20-85 µm
Width Range
2.9-4.9 µm
Striae in 10 µm
45-60

Diatoma moniliformis

Kütz. 1833

Diatoma moniliformis LM4 Diatoma moniliformis LM3 Diatoma moniliformis LM5 Diatoma moniliformis LM1 Diatoma moniliformis LM2
Length Range
10–40 µm
Width Range
2.5-6.0 µm
Striae in 10 µm
50-60