Compare Stephanodiscus hantzschii fo. tenuis
Compare
Stephanodiscus hantzschii has a lower areola density, more heavily silicified valves, and an annulus may be present or absent. Stephanodiscus binderanus has smaller valves and a higher density of fascicles. Stephanodiscus parvus has a lower areola density and a prominent central fultoportula. Cyclostephanos invisitatus has finer areolae and a higher density of fascicles.
LM scalebar = 10 µm
Diameter
15.5-19 µm
15.5-19 µm
Striae in 10 µm
5.7-7.5 based on circumferential density
5.7-7.5 based on circumferential density
Cyclostephanos invisitatus
Diameter
7.8-15.1 µm
7.8-15.1 µm
Striae in 10 µm
15-16 based on chord count, 12-15 based on circumferential density
15-16 based on chord count, 12-15 based on circumferential density
Stephanodiscus hantzschii
Diameter
11.8-20.3 µm
11.8-20.3 µm
Striae in 10 µm
6-9 fascicles based on circumferential count
6-9 fascicles based on circumferential count
Stephanodiscus binderanus
Diameter
6.3-11.8 µm
6.3-11.8 µm
Width Range
2.6-4.7 µm
2.6-4.7 µm
Striae in 10 µm
10 to 15 based on circumferential density
10 to 15 based on circumferential density
