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Compare Meridion circulare var. constrictum

(Ralfs) Brun 1880

Compare

Meridion circulare var. constrictum can be distinguished from the nominate variety by the rostrate headpole. Length, breadth, and striae counts are similar between the two varieties. Meridion alansmithii has an elongated, subrostrate headpole and the rimoportula is at the widest point of the valve.

LM scalebar = 10 µm
Kolsow Prairie Sample Edit Meridion circulare var constrictum LM1 Meridion Girdle View Edit Gurtle View Sample 33 Edit Mini Constrictum Edit
Length Range
12-55 µm
Width Range
5-8 µm
Striae in 10 µm
16-20

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

Meridion alansmithii

Brant 2003

Mealan New 1 Mealan New 2 Mealan New 3 Mealan New 4 Mealan New 7 Mealan New 5 Mealan New 6
Length Range
20-100 µm
Width Range
3.5-5.5 µm
Striae in 10 µm
14-20