Navicula germainii Wallace; 1960; 3

Synonymy

Navicula viridula var. germainii (Wallace) Lange-Bertalot 1993

Key references

Wallace. 1960. Notulae Naturae of the Academy of Natural Sciences Philadelphia. 331.

Lange-Bertalot H. 1993. 85 neue Taxa und über 100 weitere neu definierte Taxa ergänzend zur Süßwasserflora von Mitteleuropa Vol.2/1-4. Bibliotheca Diatomologica 27, J. Cramer, Berlin, Stuttgart. 454 pp

Morphology

Size
30-34 µm long, 7-7.5 µm wide (UK population), 26-40 µm long, 5-8 µm wide (Lange-Bertalot 2001).

Shape
Valves lanceolate with protracted rostrate ends.

Symmetry
Isopolar, bilaterally symmetrical.

Striae
Radiate, near apices convergent, 14-15 in 10 µm (UK population). Areolae clearly discernible in LM, 30-32 in 10 µm.

Axial area
Very narrow, linear.

Central area
Rounded, occupying approximately half of the valve width.

Raphe
Straight, filiform with small, teardrop-shaped proximal raphe ends deflected towards primary side of valve, terminal raphe fissures deflected towards secondary side.

SEM morphology
Internally, raphe opens obliquely to the secondary side, accessory rib unilaterally expanded at valve centre.

Literature

References are given in chronological order.

Reference	Citation
Wallace. 1960. Notulae Naturae of the Academy of Natural Sciences Philadelphia. 331.	Morphology; Illustrations; Description; Taxonomy;
Lange-Bertalot H. 1993. 85 neue Taxa und über 100 weitere neu definierte Taxa ergänzend zur Süßwasserflora von Mitteleuropa Vol.2/1-4. Bibliotheca Diatomologica 27, J. Cramer, Berlin, Stuttgart. 454 pp	Morphology; Illustrations; Taxonomy
Lange-Bertalot H. 2001. Navicula sensu stricto. 10 Genera Separated from Navicula sensu lato. Frustulia. Ruggell, A.R.G. Gantner. 526 pp	Morphology; Illustrations
Krammer K., Lange-Bertalot H. 2004. Süßwasserflora Mitteleuropas. Bacillariophyceae. 4. Teil. Achnanthaceae. Kritische Ergänzungen zu Achnanthes s.l., Navicula s.str., Gomphonema. Eds Ettl H., Gärtner G., Heynig H., Mollenhauer D., Gustav Fischer Verlag, Stuttgart. 468 pp	Illustrations
Segura-García V., Israde-Alcántara I., Maidana N.I. 2010. The genus Navicula sensu stricto in the upper Lerma Basin, México. I. Diatom Research. 25(2): 367-383.	Ecology
Chen S., Zhang W., Zhang J., Jeppesen E., Liu Z., Kociolek J.P., Xu X., Wang L. 2019. Local habitat heterogeneity determines the differences in benthic diatom metacommunities between different urban river types. Science of the Total Environment. 669: 711-720.	Ecology

This page should be cited as:

Jüttner I., Chudaev D., Ector L. Navicula germainii Wallace; 1960; 3. 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. 2025 . Freshwater Diatom Flora of Britain and Ireland. Amgueddfa Cymru - National Museum Wales. Available online at https://naturalhistory.museumwales.ac.uk/diatoms/browsespecies.php?-recid=2947. [Accessed: 7 April 2025].

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Record last modified: 27/12/2020