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A distinct dorsal fascia is present in Amphora copulata.

LM scalebar = 10 µm
Amphora ovalis LM4 Amphora ovalis LM2 Amphora ovalis LM1 Amphora ovalis LM3 Amphora ovalis LM5
Length Range
32-95 µm
Width Range
8-17 µm
Striae in 10 µm
10-12

Amphora copulata

(Kütz.) Schoeman and R.E.M.Archibald 1986

Amphora copulata LM6 Amphora copulata LM4 Amphora copulata LM7 Amphora copulata LM5 Amphora copulata LM1 Amphora copulata LM3 Amphora copulata LM2
Length Range
12-62 µm
Width Range
4-10 µm
Striae in 10 µm
14-17