Encyonema hebridicum (Gregory) Grunow; 1891; 48
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
Size
24.5-48.0 µm long, 7.5-10.0 µm wide (UK populations), 27.5-53.0 µm long, 7.5-9.0 µm wide (type population).
Shape
Valves with convex dorsal margin and slightly convex ventral margin, valve ends cuneate, not or slightly protracted.
Symmetry
Dorsiventral, isopolar.
Striae
Striae slightly radiate to radiate, becoming parallel to slightly convergent towards poles, 11-13 in 10 µm (UK populations), 11-12 in 10 µm (type population).
Axial area
Narrow, linear.
Central area
Indistinct or small, rounded.
Raphe
Raphe straight, displaced towards ventral margin, proximal endings deflected dorsally, distal raphe fissures deflected towards ventral side.
24.5-48.0 µm long, 7.5-10.0 µm wide (UK populations), 27.5-53.0 µm long, 7.5-9.0 µm wide (type population).
Shape
Valves with convex dorsal margin and slightly convex ventral margin, valve ends cuneate, not or slightly protracted.
Symmetry
Dorsiventral, isopolar.
Striae
Striae slightly radiate to radiate, becoming parallel to slightly convergent towards poles, 11-13 in 10 µm (UK populations), 11-12 in 10 µm (type population).
Axial area
Narrow, linear.
Central area
Indistinct or small, rounded.
Raphe
Raphe straight, displaced towards ventral margin, proximal endings deflected dorsally, distal raphe fissures deflected towards ventral side.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Gregory W. 1854. Notice of the new forms and varieties of known forms occurring in the diatomaceous earth of Mull; with remarks on the classification of the Diatomaceae. Quarterly Journal of Microscopical Science, London. 2: 90-100; pl. IV. | Illustrations; Morphology |
| Cleve P.T., Möller J.D. 1877. Diatoms. Part I. No.1-48. Esatas Edquists Boktryckeri, Upsala. | Taxonomy |
| Cleve P.T. 1891. The diatoms of Finland. Acta Societatia pro Fauna et Flora Fennica. 8(2): 1-68. | Morphology; Illustrations |
| Cleve P.T. 1894. Synopsis of the Naviculoid Diatoms. Part I. Kongliga Svenska-Vetenskaps Akademiens Handlingar 26(2), 1-194, 5 pls. | Morphology |
| 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; Type Illustration |
| Lange-Bertalot H., Hofmann G., Werum M., Cantonati M. 2017. Freshwater Benthic Diatoms of Central Europe: Over 800 Common Species Used in Ecological Assessment. Cantonati M., Kelly M.G., Lange-Bertalot H. (eds.), Koeltz Botanical Books, Schmitten-Oberreifenberg, Germany. 942 pp | Morphology; Illustrations; Ecology |
This page should be cited as:
Jüttner I., Van de Vijver B., Williams D.M. Encyonema hebridicum (Gregory) Grunow; 1891; 48. 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=4658. [Accessed:
].
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Record last modified: 09/12/2022