Encyonopsis minuta Reichardt & Krammer; 1997; 95
Key references
Krammer K. 1997. Die cymbelloiden Diatomeen. Eine Monographie der weltweit bekannten Taxa. Teil 2. Encyonema part., Encyonopsis and Cymbellopsis. Bibliotheca Diatomologica, Vol. 37, J. Cramer, Berlin. 469 pp
Morphology
Shape
Valves lanceolate to linear-lanceolate, convex dorsal margin only slightly more curved than the convex ventral margin, sometimes the valves can be almost symmetrical, dorsal and ventral margins taper gradually, near the apices a little more strongly, towards the rostrate to subcapitate apices, apices sometimes slightly deflected towards the ventral side.
Symmetry
Isopolar, dorsiventral, sometimes almost symmetrical.
Striae
Fine but easily resolved, more or less parallel throughout the valve, slightly more radiate near the poles.
Axial area
Very narrow, linear.
Central area
Not wider than the axial area.
Raphe
Filiform, positioned more or less in the centre of the valve or slightly nearer to the dorsal margin, straight to very slightly biarcuate in the central section of the valve, with slightly dorsally deflected proximal endings; central and polar nodules visible; the latter slightly short from the apices, distal raphe fissure deflected ventrally (SEM).
Valves lanceolate to linear-lanceolate, convex dorsal margin only slightly more curved than the convex ventral margin, sometimes the valves can be almost symmetrical, dorsal and ventral margins taper gradually, near the apices a little more strongly, towards the rostrate to subcapitate apices, apices sometimes slightly deflected towards the ventral side.
Symmetry
Isopolar, dorsiventral, sometimes almost symmetrical.
Striae
Fine but easily resolved, more or less parallel throughout the valve, slightly more radiate near the poles.
Axial area
Very narrow, linear.
Central area
Not wider than the axial area.
Raphe
Filiform, positioned more or less in the centre of the valve or slightly nearer to the dorsal margin, straight to very slightly biarcuate in the central section of the valve, with slightly dorsally deflected proximal endings; central and polar nodules visible; the latter slightly short from the apices, distal raphe fissure deflected ventrally (SEM).
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Krammer K. 1997. Die cymbelloiden Diatomeen. Eine Monographie der weltweit bekannten Taxa. Teil 2. Encyonema part., Encyonopsis and Cymbellopsis. Bibliotheca Diatomologica, Vol. 37, J. Cramer, Berlin. 469 pp | Morphology; Taxonomy; Description; Type Illustration; |
| Hofmann G., Werum M., Lange-Bertalot H. 2011. Diatomeen im Süßwasser-Benthos von Mitteleuropa. A.R.G. Gantner, Ruggell. 908 pp | Morphology; Illustrations |
| Bahls L.L. 2013. Northwest Diatoms. Encyonopsis from western North America: 31 species from Alberta, Idaho, Montana, Oregon, South Dakota, and Washington, including 17 species described as new. Vol. 5. Loren L. Bahls, Helena. | Morphology; Ecology; Illustrations |
Similar Species
Similar species not published on this website:
This page should be cited as:
Cox E. J., Jones V., Jüttner I. Encyonopsis minuta Reichardt & Krammer; 1997; 95. 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=2536. [Accessed:
].
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Record last modified: 27/12/2020