Taxon Account

Fragilaria tenera var. tenera (W. Smith) Lange-Bertalot; 1980; 746

Key references

Lange-Bertalot H., Ulrich S. 2014. Contributions to the taxonomy of needle-shaped Fragilaria und Ulnaria species. Lauterbornia. 78: 1-73.

Morphology

Size
Length 60-120 µm, width 1.8-2.5 µm (Lange-Bertalot & Ulrich 2014).

Shape
Valves linear, gradually tapering nearer to the subcapitate ends.

Symmetry
Isopolar, bilaterally symmetrical.

Striae
Striae parallel, alternating, 18-20 in 10 µm (Lange-Bertalot & Ulrich 2014).

Axial area
Slightly widened.

Central area
Appears mostly indistinct in LM, ghost stria present, sometimes it is widenend.


SEM morphology
Uniseriate striae with occluded, round or apically elongate areolae.

Two apical pore fields.

One rimoportula near a pore field.

Spines are present along the valve margin.

Literature

References are given in chronological order.

Reference
Citation
Smith W. 1856. A Synopsis of the British Diatomaceae. John van Voorst, London. 107 pp; pls 32-62, pls A-E Morphology; Description
Lange-Bertalot H. 1980. Zur systematischen Bewertung der bandförmigen Kolonien bei Navicula und Fragilaria. Kriterien für die Vereinigung von Synedra (subgen. Synedra) Ehrenberg mit Fragilaria Lyngbye. Nova Hedwigia. 33: 723-787. Taxonomy
Lange-Bertalot H., Ulrich S. 2014. Contributions to the taxonomy of needle-shaped Fragilaria und Ulnaria species. Lauterbornia. 78: 1-73. Morphology; Type Illustration; Taxonomy
This page should be cited as:

Jüttner I. Fragilaria tenera var. tenera (W. Smith) Lange-Bertalot; 1980; 746. In: Jüttner I., Carter C., Chudaev D., 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=2554. [Accessed:  ].

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Record last modified: 27/12/2020