Encyonema minutum (Hilse) D.G. Mann; 1990; 667
Synonymy
Cymbella minuta Hilse in Rabenhorst 1862
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, straight ventral margin, and rounded, sometimes very slightly protracted ends.
Symmetry
Dorsiventral.
Striae
Striae slighty radiate dorsally, ventrally slightly radiate in the central section, becoming parallel or slightly convergent towards the poles.
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.
SEM morphology
Areolae apically elongate. The external areola openings adjacent to the proximal raphe ends round.
Valves cymbelloid with convex dorsal margin, straight ventral margin, and rounded, sometimes very slightly protracted ends.
Symmetry
Dorsiventral.
Striae
Striae slighty radiate dorsally, ventrally slightly radiate in the central section, becoming parallel or slightly convergent towards the poles.
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.
SEM morphology
Areolae apically elongate. The external areola openings adjacent to the proximal raphe ends round.
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; Illustrations; Type Illustration; |
| Cantonati M., Lange-Bertalot H. 2010. Diatom biodiversity of springs in the Berchtesgaden National Park (north-eastern Alps, Germany), with the ecological and morphological characterization of two species new to science. Diatom Research. 25(2): 251-280. | Illustrations |
| 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 minutum (Hilse) D.G. Mann; 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=2534. [Accessed:
].
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Record last modified: 27/12/2020