Encyonema silesiacum (Bleisch in Rabenhorst) D.G. Mann in Round et al.; 1990; 667
Synonymy
Cymbella silesiaca Bleisch in Rabenhorst 1861-1882
Key references
Krammer K. 1997. Die cymbelloiden Diatomeen - Eine Monographie der weltweit bekannten Taxa. Teil 1. Allgemeines und Encyonema Part. Bibliotheca Diatomologica, Vol. 36, J. Cramer, Berlin. 382 pp
Van de Vijver B., Peeters V., Wilfert K., de Haan M. 2024. Two new Encyonema species from Europe compared to the type material of Encyonema minutum and E. silesiacum (Gomphonemataceae, Bacillariophyceae). Botany Letters. https://doi.org/10.1080/23818107.2024.2308819.
Morphology
Shape
Valves cymbelloid with convex dorsal margin, more or less straight ventral margin, sometimes slightly inflated in the central section, and rounded, sometimes slightly protracted ends.
Symmetry
Dorsiventral.
Striae
Striae slighty radiate dorsally, ventrally slightly radiate in the central section, changing to convergent towards the poles; areolae are apically elongate (SEM) and can be visible in LM; central dorsal stria with a round areola slightly set apart at the central area.
Axial area
Narrow, straight.
Central area
Not differentiated from the axial area.
Raphe
Appears straight, displaced towards the ventral margin, with slightly expanded, slightly dorsally bent proximal endings, and short ventrally deflected terminal fissures near the poles.
Valves cymbelloid with convex dorsal margin, more or less straight ventral margin, sometimes slightly inflated in the central section, and rounded, sometimes slightly protracted ends.
Symmetry
Dorsiventral.
Striae
Striae slighty radiate dorsally, ventrally slightly radiate in the central section, changing to convergent towards the poles; areolae are apically elongate (SEM) and can be visible in LM; central dorsal stria with a round areola slightly set apart at the central area.
Axial area
Narrow, straight.
Central area
Not differentiated from the axial area.
Raphe
Appears straight, displaced towards the ventral margin, with slightly expanded, slightly dorsally bent proximal endings, and short ventrally deflected terminal fissures near the poles.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Round F.E., Crawford R.M., Mann D.G. 1990. The Diatoms. Biology & Morphology of the Genera. Cambridge University Press, Cambridge. 747 pp | Taxonomy |
| Krammer K. 1997. Die cymbelloiden Diatomeen - Eine Monographie der weltweit bekannten Taxa. Teil 1. Allgemeines und Encyonema Part. Bibliotheca Diatomologica, Vol. 36, J. Cramer, Berlin. 382 pp | Morphology; Taxonomy; Illustrations; Type Illustration |
| Cocquyt C. 2007. Diatom diversity in Hausburg Tarn, a glacial lake on Mount Kenya, East Africa. Diatom Research. 22(2): 255-285. | Illustrations; Ecology; Morphology |
| Kermarrec L., Ector L., Bouchez A., Rimet F., Hoffmann L. 2011. A preliminary phylogenetic analysis of the Cymbellales based on 18S rDNA gene sequencing. Diatom Research. 26(3): 305-315. | Illustrations; Biology; Morphology |
| Van de Vijver B., Peeters V., Wilfert K., de Haan M. 2024. Two new Encyonema species from Europe compared to the type material of Encyonema minutum and E. silesiacum (Gomphonemataceae, Bacillariophyceae). Botany Letters. https://doi.org/10.1080/23818107.2024.2308819. | Morphology; Type Illustration; |
Similar Species
Similar species not published on this website:
This page should be cited as:
Jüttner I. Encyonema silesiacum (Bleisch in Rabenhorst) D.G. Mann in Round et al.; 1990; 667. 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..
Freshwater Diatom Flora of Britain and Ireland. Amgueddfa Cymru - National Museum Wales. Available online at https://naturalhistory.museumwales.ac.uk/diatoms/browsespecies.php?-recid=2911. [Accessed:
].
Image Gallery
Record last modified: 27/12/2020