Taxon Account

Encyonema cespitosum Kützing; 1849; 61

Synonymy

Cymbella caespitosa (Kützing) Brun 1880
Encyonema prostratum Kützing 1844

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

Morphology

Shape
Valves cymbelloid with convex dorsal margin, very slightly convex ventral margin and rounded, sometimes slightly protracted ends.

Symmetry
Dorsiventral.

Striae
Striae slighty radiate throughout the valve; areolae are apically elongate (SEM) and clearly visible in LM, striae adjacent to central area terminate sometimes in small round areolae (SEM).

Axial area
Narrow, straight.

Central area
Indistinct, sometimes very small oval.

Raphe
Appears straight or slightly curved, slightly displaced ventrally, with expanded, slightly dorsally bent proximal endings, and short ventrally deflected terminal fissures near the valve margin.

Literature

References are given in chronological order.

Reference
Citation
Kützing F.T. 1849. Species Algarum. Lipsiae. F.A. Brockhaus. 922 pp. Description; Morphology
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;
Silva W.J., Jahn R., Ludwig T.A.V., Menezes M. 2013. Typification of seven species of Encyonema and characterization of Encyonema leibleinii comb. nov. Fottea, Olomouc. 13(2): 119-132. Morphology; Type Illustration
This page should be cited as:

Jüttner I. Encyonema cespitosum Kützing; 1849; 61. In: Jüttner I., Carter C., Chudaev D., 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=3545. [Accessed:  ].

Image Gallery

Record last modified: 27/12/2020