Tetracyclus

Category

Araphid
Class

Fragilariophyceae
Order

Tabellariales
Family

Tabellareaceae

Type Species

Tetracyclus lacustris Ralfs

Contributor

Sarah Spaulding, Mark Edlund - Dec 2008

Species
Citations & Links
Updates

Citations & Links

Citations

Kociolek, J.P., Williams, D.M. and Danz, A. (2022) Taxonomy and valve ultrastructure of new and interesting freshwater fossil diatoms (Bacillariophyta) of Miocene age from the Espanola Formation of New Mexico, USA. I. Ontogeny of Tetracyclus stelloides sp. nov., with comments on ‘Accepted Names’ and Hustedt's concepts of ‘Convergence’ and ‘Miserable Forms’. Diatom Research

Publication Link: 10.1080/0269249X.2022.2087742
Williams, D.M. (1985) Morphology, taxonomy and inter-relationships of the ribbed araphid diatoms from the genera Diatoma and Meridion (Diatomaceae: Bacillariophyta). Bibliotheca Diatomologica 8: 1-228
Williams, D.M. (1987) Observations on the genus Tetracyclus Ralfs (Bacillariophyta) I. Valve and girdle structure of the extant species British Phycological Journal 22: 383-399

Publication Link: 10.1080/00071618700650451
Williams, D.M. (1989) Observations on the genus Tetracyclus Ralfs (Bacillariophyta) II. Morphology and taxonomy of some fossil species previously classified in Stylobium Ehrenberg British Phycological Journal 24: 317-327

Publication Link: 10.1080/00071618900650331
Williams, D.M. (1990) Cladistic analysis of some freshwater araphid diatoms (Bacillariophyta) with particular reference to Diatoma and Meridion. Plant Systematics and Evolution 171: 89-97.
Williams, D.M. (1990) Distrionella D.M. Williams, nov. gen., a new araphid diatom (Bacillariophyta) genus closely related to Diatoma Bory. Archiv für Protistenkunde 138: 171-177
Williams, D.M. (1990) Examination of auxospore valves in Tetracyclus from fossil specimens and the establishment of their identity Diatom Research 5: 198-194
Williams, D.M. (1996) Fossil species of the diatom genus Tetracyclus (Bacillariophyta, 'Ellipticus' species group): Morphology, interrelationships and the relevance of ontogeny Philosophical Transactions of the Royal Society of London, B, 351:1 759-1782

Publication Link: 10.1098/rstb.1996.0156
Williams, D.M. and Li, J. (1990) Observations on the diatom genus Tetracyclus Ralfs (Bacillariophyta) III. Description of two new species from Chinese fossil deposits British Phycological Journal 25: 335-338

Updates

Aug 19, 2013 - Correction to genus description

The guide points and text describing the features of the genus was corrected to conform more to the work of Williams (1987). - S. Spaulding

Cite This Page

Spaulding, S., Edlund, M. (2008). Tetracyclus. In Diatoms of North America. Retrieved November 17, 2025, from https://diatoms.org/genera/tetracyclus

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Displaying 4 of 4 species

Citations & Links

Citations

Links

Updates

Aug 19, 2013 - Correction to genus description

Cite This Page