Taxon Account

Navicula tripunctata (O.F. Müller) Bory; 1822; 128

Key references

Cox E.J. 1979. Symmetry and valve structure in naviculoid diatoms. Nova Hedwigia Beiheft. 64: 193-206.

Morphology

Size
30-70 µm long, 6-10 µm wide (UK populations).

Shape
Valves linear to linear-lanceolate with somewhat cuneate, rounded apices.

Symmetry
Isopolar, bilaterally symmetrical.

Striae
Slightly radiate, becoming parallel towards the apices and convergent at the apices, 9-12 in 10 µm; two or three shortened striae opposite the central area, sometimes slightly wider spaced.

Axial area
Narrow linear.

Central area
Square to rectangular, extending half or more than half the valve width.

Raphe
Straight, with only very slightly expanded central endings, terminating at the edges of the central area; terminal endings hooked at the apices.

Literature

References are given in chronological order.

Reference
Citation
Bory de Saint-Vincent J.B.M. and coll. 1822. Dictionnaire Classique d'Histoire Naturelle Paris. Rey & Gravier, libraires-éditeurs; Baudouin Frères, libraires-éditeurs., Vol.2. Morphology; Description
Cox E.J. 1979. Symmetry and valve structure in naviculoid diatoms. Nova Hedwigia Beiheft. 64: 193-206. Morphology; Illustrations;
Hofmann G., Werum M., Lange-Bertalot H. 2011. Diatomeen im Süßwasser-Benthos von Mitteleuropa. A.R.G. Gantner, Ruggell. 908 pp Ecology; Morphology; Illustrations
This page should be cited as:

Cox E. J., Jones V. Navicula tripunctata (O.F. Müller) Bory; 1822; 128. 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=3364. [Accessed:  ].

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Record last modified: 27/12/2020