Compare

Stauroneis circumborealis has wider axial and central areas and proximal raphe ends that are more strongly inflated and curved. Stauroneis gracilis and S. supergracilis have narrower valves in proportion to their length. Stauroneis phoenicenteron and S. rex have straight, rather than curved, proximal raphe ends. Stauroneis sonyae has elliptic- or rhombic-lanceolate valves and a very wide stauros, often with numerous short striae.

LM scalebar = 10 µm
Stauroneis heinii LM7 Stauroneis heinii LM6 Stauroneis heinii LM5 Stauroneis heinii LM2 Stauroneis heinii LM1 Stauroneis heinii LM4
Length Range
116-191 µm
Width Range
22-36 µm
Striae in 10 µm
15-17

Stauroneis circumborealis

Lange-Bert. and Krammer 1999

Stauroneis circumborealis LM6 Stauroneis circumborealis LM5 Stauroneis circumborealis LM4 Stauroneis circumborealis LM3 Stauroneis circumborealis LM2 Stauroneis circumborealis LM1
Length Range
81-148 µm
Width Range
20-31 µm
Striae in 10 µm
14-16

Stauroneis phoenicenteron

(Nitzsch) Ehrenb. 1843

Stauroneis phoenicenteron LM5 Stauroneis phoenicenteron LM4 Stauroneis phoenicenteron LM3 Stauroneis phoenicenteron LM2 Stauroneis phoenicenteron LM1
Length Range
129-199 µm
Width Range
26-35 µm
Striae in 10 µm
15-18

Stauroneis rex

L.L.Bahls 2010

Stauroneis rex LM6 Stauroneis rex LM2 Stauroneis rex LM5 Stauroneis rex LM1 Stauroneis rex LM3 Stauroneis rex LM7
Length Range
215-386 µm
Width Range
38-60 µm
Striae in 10 µm
12-14

Stauroneis gracilis

Ehrenb. 1843

Stauroneis gracilis LM7 Stauroneis gracilis LM6 Stauroneis gracilis LM1 Stauroneis gracilis LM4 Stauroneis gracilis LM3 Stauroneis gracilis LM2
Length Range
68-127 µm
Width Range
13-22 µm
Striae in 10 µm
15-18

Stauroneis sonyae

Kulikovskiy, Lange-Bert., Witkowski and Dorofeyuk 2010

Stauroneis sonyae LM6 Stauroneis sonyae LM4 Stauroneis sonyae LM5 Stauroneis sonyae LM3 Stauroneis sonyae LM2 Stauroneis sonyae LM1
Length Range
118-177 µm
Width Range
26-37 µm
Striae in 10 µm
14-16

Stauroneis supergracilis

Van de Vijver and Lange-Bert. 2004

Stauroneis supergracilis LM14 Stauroneis supergracilis LM13 Stauroneis supergracilis LM11 Stauroneis supergracilis LM10 Stauroneis supergracilis LM12 Stauroneis supergracilis LM1 Stauroneis supergracilis LM7
Length Range
124-213 µm
Width Range
21-33 µm
Striae in 10 µm
15-16