Taxon Account

Melosira varians Agardh; 1827; 628

Coscinodiscophyceae: Coscinodiscophycidae: Melosirales: Melosiraceae

Key references

Crawford R.M. 1978. The taxonomy and classification of the diatom genus Melosira C. A. Agardh. III. Melosira lineata (Dillw.) C.A.Ag. and M. varians C.A.Ag.
.
Phycologia. 17(3): 237-250.

Morphology

Shape
Cells cylindrical to ± spherical; circular in outline, isolated valves are circular in valve view or rectangular in girdle view.

Symmetry
Radial, frustules isovalvar.

Other features
Several wide porous bands are present. Chloroplasts several to many, plate-like, lobed, each with a central pyrenoid.


SEM morphology
Small spines and granules may be present externally, especially in the region where adjacent cells touch and link together.

Valves chambered (loculate), with chambers opening externally by many tiny pores.

Literature

References are given in chronological order.

Reference
Citation
Agardh C.A. 1827. Aufzählung einiger in den ostereichischen Ländern gefundenen neuen Gattungen und Arten von Algen nebst ihrer Diagnostik und beigefügten Bemerkungen. Flora oder Botanische Zeitung, Regensburg. 40: 625-640. Morphology; Taxonomy; Description
Crawford R.M. 1971. The fine structure of the frustule of Melosira varians C. A. Agardh. British Phycological Journal. 6(2): 175-186. Morphology; Illustrations
Crawford R.M. 1978. The taxonomy and classification of the diatom genus Melosira C. A. Agardh. III. Melosira lineata (Dillw.) C.A.Ag. and M. varians C.A.Ag.
.
Phycologia. 17(3): 237-250.
Taxonomy; Illustrations;
Hofmann G., Werum M., Lange-Bertalot H. 2011. Diatomeen im Süßwasser-Benthos von Mitteleuropa. A.R.G. Gantner, Ruggell. 908 pp Morphology; Ecology; Illustrations
This page should be cited as:

Mann D. G., Jüttner I. Melosira varians Agardh; 1827; 628. In: Jüttner I., Bennion H., Carter C., Cox E.J., Ector L., Flower R., Jones V., Kelly M.G., Mann D.G., Sayer C., Turner J. A., 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=3358. [Accessed:  ].

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Record last modified: 14/11/2016 12:51:06