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Compare Aulacoseira granulata

(Ehrenb.) Simonsen 1979

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Aulacoseira granulata differs from A. muzzanensis by greater mantle height/valve diameter ratio. It differs from A. granulata var. angustissima by wider cells and lower mantle height/valve diameter ratio. Aulacoseira herzogii can be easily differentiated from A. granulata by much finer areolae, almost non-resolvable in LM, and shorter colonies. Linking valves of A. granulata are occasionally misidentified as A. ambigua, but can be distinguished by their large square mantle areolae and solid ringleiste.

LM scalebar = 10 µm
Aulacoseira granulata LM1 Aulacoseira granulata LM2 Aulacoseira granulata LM3 Aulacoseira granulata LM4 Aulacoseira granulata LM5 Aulacoseira granulata LM6
Diameter
4-17 µm
Width Range
4-20 µm
Striae in 10 µm
8-18

Aulacoseira muzzanensis

(F.Meister) Krammer 1991

Aulacoseira muzzanensis LM3 Aulacoseira muzzanensis LM2 Aulacoseira muzzanensis LM5 Aulacoseira muzzanensis LM4 Aulacoseira muzzanensis LM7 Aulacoseira muzzanensis LM6 Aulacoseira muzzanensis LM1
Diameter
9-24 µm
Width Range
5-13 µm
Striae in 10 µm
7-15

Aulacoseira ambigua

(Grunow) Simonsen 1979

Aulacoseira ambigua LM5 Aulacoseira ambigua LM6 Aulacoseira ambigua LM3 Aulacoseira ambigua LM4 Aulacoseira ambigua LM7 Aulacoseira ambigua LM1 Aulacoseira ambigua LM2
Diameter
3-12 µm
Width Range
5-15 µm
Striae in 10 µm
17-22

Aulacoseira herzogii

(Lemmerm.) Simonsen 1979

Aulacoseira herzogii LM7 Aulacoseira herzogii LM6 Aulacoseira herzogii LM1 Aulacoseira herzogii LM2 Aulacoseira herzogii LM3 Aulacoseira herzogii LM4 Aulacoseira herzogii LM5
Diameter
3-7 µm
Width Range
7-14 µm
Striae in 10 µm
30-32

Aulacoseira granulata var. angustissima

(O.Müll.) Simonsen 1979

Aulacoseria granulata var. angustissima LM1 Aulacoseria granulata var. angustissima LM2 Aulacoseria granulata var. angustissima LM7 Aulacoseria granulata var. angustissima LM6 Aulacoseria granulata var. angustissima LM3 Aulacoseria granulata var. angustissima LM4 Aulacoseria granulata var. angustissima LM5
Diameter
2.5-4 µm
Width Range
8-20 µm
Striae in 10 µm
10-20