Cyclostephanos Round ex E.C.Ther., Håk., Kociolek, Round & Stoermer; 1987; 346
Key references
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
Cells solitary or in chains.
Cells cylindrical in girdle view, mostly circular in valve view. Valve face flat to concentrically undulate.
Fascicles radial extending onto mantle, separated by interfascicles, the latter can be raised and branched. Interfasciles thickened internally near valve margin, forming alveolar chambers.
External areola openings round or polygonal, internally areolae occluded by domed, perforated cribrae; cribrae flattened on valve mantle.
Conical separation spines present at valve face/mantle junction, linking spines can be present.
Marginal fultoportulae situated on mantle 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.
Rimoportulae located on valve mantle. Girdle composed of several copulae.
Numerous small, peripheral chloroplasts.
Cells cylindrical in girdle view, mostly circular in valve view. Valve face flat to concentrically undulate.
Fascicles radial extending onto mantle, separated by interfascicles, the latter can be raised and branched. Interfasciles thickened internally near valve margin, forming alveolar chambers.
External areola openings round or polygonal, internally areolae occluded by domed, perforated cribrae; cribrae flattened on valve mantle.
Conical separation spines present at valve face/mantle junction, linking spines can be present.
Marginal fultoportulae situated on mantle 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.
Rimoportulae located on valve mantle. Girdle composed of several copulae.
Numerous small, peripheral chloroplasts.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Round F.E. 1982. Cyclostephanos - new genus within the Sceletonemaceae. Archiv für Protistenkunde. 125: 323-329. | Morphology; Taxonomy; Description; Type Illustration |
| Theriot E., Håkansson H., Kociolek J.P., Round F.E., Stoermer E.F. 1987. Validation of the centric diatom genus name Cyclostephanos. British Phycological Journal. 22(4): 345-347. | Morphology; Taxonomy |
| 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 |
| 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 |
| Tapia P.M., Theriot E.C., Fritz S.C., Cruces F., Rivera P. 2004. Distribution and morphometric analysis of Cyclostephanos andinus comb. nov., a planktonic diatom from the central Andes. Diatom Research. 19(2): 311-327. | Morphology; Ecology; 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; Illustrations; Taxonomy |
| 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; Taxonomy; Illustrations; |
| 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; Ecology; Illustrations |
| Reavie E.D., Kireta A.R. 2015. Centric, Araphid and Eunotioid Diatoms of the Coastal Laurentian Great Lakes. Bibliotheca Diatomologica. 62: 184. | Morphology; Ecology; Illustrations |
| Genkal S.I., Kulikovskiy M.S., Kuznetsova I.V. 2020. The Recent Freshwater Centric Diatoms of Russia. Filigran, Yaroslavl. 433 pp | Morphology; Illustrations; Taxonomy |
This page should be cited as:
Jüttner I., Schultz K., Ector L., Wetzel C.E. Cyclostephanos Round ex E.C.Ther., Håk., Kociolek, Round & Stoermer; 1987; 346. 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 https://naturalhistory.museumwales.ac.uk/diatoms/browsespecies.php?-recid=3695. [Accessed:
].
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Record last modified: 22/04/2021