Taxon Account

Stephanodiscus C.Ehrenb.; 1845; 72

Key references

Håkansson H. 2002. A compilation and evaluation of species in the genera Stephanodiscus, Cyclostephanos and Cyclotella with a new genus in the family Stephanodiscaceae. Diatom Research. 17(1): 1-139.


Cells solitary or in chains.

Cells cylindrical in girdle view, mostly circular in valve view.

Valve face flat or concentrical, rarely transversally, undulate.

Valve surface plain or with granules.

No differentiation in ornamentation between central and marginal area.

Fascicles radial, separated by interfascicles, the latter can be raised. External areola openings on valve face circular, internally occluded by domed cribra.

Spines present at valve face/mantle junction. Separation spines conical of different length, linking spines can be present.

Marginal fultoportulae can be present, situated on interfascicles, fultoportulae can be present in centre of valve face.

Fultoportulae with simple, round external openings or short tube, internally with central tube and satellite pores.

Marginal rimoportulae inserted in ring of spines.

Girdle composed of several copulae.

Numerous small, peripheral chloroplasts.


References are given in chronological order.

Ehrenberg C.G. 1845. Neue Untersuchungen über das kleinste Leben als geologisches Moment . Bericht über die zur Bekanntmachung geeigneten Verhandlungen der Königlich-Preussischen Akademie der Wissenschaften zu Berlin 1845. 53-87 pp Morphology; Taxonomy; Description
Round F.E. 1970. The delineation of the genera Cyclotella and Stephanodiscus by light microscopy transmission and reflecting electron microscopy. Beihefte zur Nova Hedwigia. 31: 591-604. Morphology; Illustrations
Round F.E. 1972. Stephanodiscus binderanus (Kütz.) Krieger or Melosira binderana Kütz. (Bacillariophyta, Centrales). Phycologia. 11(2): 109-117. Morphology; Illustrations
Haworth E.Y. 1979. The distribution of a species of Stephanodiscus in the recent sediments of Belham Tarn, English Lake District. Nova Hedwigia Beiheft. 64: 395-410. Ecology
Round F.E. 1981. The diatom genus Stephanodiscus: An electron-microscopic view of the classical species. Archiv für Protistenkunde. 124: 455-470. Morphology; Illustrations
Anderson N.J. 1990. The biostratigraphy and taxonomy of small Stephanodiscus and Cyclostephanos species (Bacillariophyceae) in a eutrophic lake, and their ecological implications. British Phycological Journal. 25(3): 217-235. Morphology; Ecology; Illustrations
Spamer E.E., Theriot E.C. 1997. 'Stephanodiscus minutulus', 'S. minutus', and similar epithets in taxonomic, ecological, and evolutionary studies of modern and fossil diatoms (Bacillariophyceae: Thalassiosiraceae) - A century and a half of uncertain taxonomy and nomenclatural hearsay. Proceedings of the Academy of Natural Sciences of Philadelphia. 148: 231-272. Morphology; Taxonomy; Illustrations; Ecology
Håkansson H. 2002. A compilation and evaluation of species in the genera Stephanodiscus, Cyclostephanos and Cyclotella with a new genus in the family Stephanodiscaceae. Diatom Research. 17(1): 1-139. ; Morphology; Taxonomy; Illustrations
Kiss K.T., Klee R., Ector L., Ács E. 2012. Centric diatoms of large rivers and tributaries in Hungary: morphology and biogeographic distribution. Acta Botanica Croatica. 71(2): 1-53. Morphology; Taxonomy; Illustrations
Houck V., Klee R., Tanaka H. 2014. Atlas of freshwater centric diatoms with a brief key and descriptions part IV. Stephanodiscaceae B Stephanodiscus, Cyclostephanos, Pliocaenicus, Hemistephanos, Stephanocostis, Mesodictyon & Spicaticribra. Fottea Supplement. 530 pp. Morphology; Illustrations; Taxonomy
Kociolek J.P., Theriot E.C., Williams D.M., Julius M., Stoermer E.F., Kingston J.C. 2015. Centric and Araphid Diatoms. In: Wehr J.D., Sheath R.G., Kociolek J.P. (eds.) Freshwater Algae of North America. Academic Press, San Diego. 653-708 pp Morphology; Illustrations; Ecology
Reavie E.D., Kireta A.R. 2015. Centric, Araphid and Eunotioid Diatoms of the Coastal Laurentian Great Lakes. 62. Bibliotheca Diatomologica. 184 pp Morphology; Ecology; Illustrations
This page should be cited as:

Jüttner I., Schultz K., Ector L., Wetzel C.E. Stephanodiscus C.Ehrenb.; 1845; 72. In: Jüttner I., Carter C., Cox E.J., Ector L., Jones V., Kelly M.G., Kennedy B., Mann D.G., Turner J. A., Van de Vijver B., Wetzel C.E., Williams D.M.. Freshwater Diatom Flora of Britain and Ireland. Amgueddfa Cymru - National Museum Wales. Available online at [Accessed:  ].

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Record last modified: 22/04/2021