Compare Stephanocyclus meneghinianus | Species - Diatoms of North America

Compare

Cyclotella atomus is smaller (valves < 8.5 µm in diameter) lacks spines, and marginal fultoportulae are distinct and extend beyond the valve margin.

Cyclotella cryptica has coarse striae (6-10 striae in 10 µm). Cyclotella operculata has narrow tapering striae and the valve face is strongly undulate.

Stephanocyclus gamma has coarse striae (5-9 striae in 10 µm) and the valve is strongly transversely undulate.

LM scalebar = 10 µm

Cy Meneghiniana 15624A 09212015 07 Cl

Cy Meneghiniana 15640A 10132015 08 Cl

Cy Meneghiniana 15540A 09172015 04 Cl

Cy Meneghiniana 15615A 08242015 11 Cl

Cy Meneghiniana 15596A 09042015 24 Cl

Cy Meneghiniana 15540A 09172015 21 Cl

Diameter
6.24-18.12 µm

Striae in 10 µm
7-8 (chambered striae by circumference)

Cyclotella atomus

Hust. 1937

Cyclotella atomus LM2

Cyclotella atomus LM6

Cyclotella atomus LM7

Cyclotella atomus LM9

Cyclotella atomus LM8

Cyclotella atomus LM3

Diameter
5-7.5 µm

Striae in 10 µm
16-18

Stephanocyclus gamma

(Sovereign) Kulikovskiy, Genkal and Kociolek 2022

Cyclotella Gamma 1

Cyclotella Gamma 2

Cyclotella Gamma 4

Cyclotella Gamma 5

Cyclotella Gamma 6

Cyclotella Gamma 7

Diameter
18.1-48.2 µm

Striae in 10 µm
6-8

Cyclotella distinguenda

Hust. 1927

Cdis29 2

Cdis22 9

Cdis22 9B

Cdis19 6

Cdis12 7

Cdis11 8B

Cdis9 6

Diameter
7.4-21.9 µm

Striae in 10 µm
12.5-14.7 (by circumference)

Also compare to

Cyclotella cryptica

Reimann, J.C.Lewin and Guillard

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