Compare Stephanodiscus minutulus
Compare
Stephanodiscus parvus has a prominent central fultoportula and a weakly undulate valve face. Stephanodiscus binderanus and S. hantzschii are quite distinct, as they both have a flat valve face. Cyclostephanos tholiformis has a central annulus and a higher density of areolae. Stephanodiscus oregonicus has larger valves, multiseriate fascicles and variation in interfascicle shape.
LM scalebar = 10 µm
Diameter
6-10 µm
6-10 µm
Striae in 10 µm
8-13 based on circumferential density
8-13 based on circumferential density
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
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
