Diatoms of North AmericaDiatoms of North America
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Compare Meridion lineare

D.M.Williams 1985

Compare

Meridion circulare has markedly heteropolar valves. Odontidium mesodon has more elliptic valves and a higher stria density. The costae of D. hiemalis are oriented diagonally.

LM scalebar = 10 µm
Meridion lineare LM1 Meridion lineare LM2 Meridion lineare LM3 Meridion lineare LM4 Meridion lineare LM5 Meridion lineare LM6 Meridion lineare LM7
Length Range
11-31 µm
Width Range
4.8-8.0 µm
Striae in 10 µm
11-19, mostly 16-18

Odontidium mesodon

(Ehrenb.) Kütz. 1844

Odontidium mesodon LM7 Odontidium mesodon LM2 Odontidium mesodon LM6 Odontidium mesodon LM4 Odontidium mesodon LM3 Odontidium mesodon LM1 Odontidium mesodon LM5
Length Range
10–40 µm
Width Range
6–12 µm
Striae in 10 µm
25-35

Meridion circulare

(Grev.) C.Agardh 1831

Meridion circulare LM3 Meridion circulare LM2 Meridion circulare LM1 Meridion circulare LM6 Meridion circulare LM5
Length Range
17-80 µm
Width Range
3-4 µm

Also compare to

Diatoma hiemalis

(Roth) Heib. 1863