Desmids –
Archaeplastida (Part)
Observations on Euastrum oblongum
Gallery Prof. Rupert Lenzenweger
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Euastrum oblongum Greville ex Ralfs 1848
Most likely ID: n.a.
Basionym: n.a.
Add’l Synonyms: Euastrum pecten Ehrenberg 1832
Echinella oblonga Greville 1833
Micrasterias sinuata L.A.Brébisson 1835
Eutomia oblonga (Greville) Harvey 1841
Euastrum oblongiforme C.Cramer 1863
Euastrum oblongum f. oblongiforme (C.Cramer) G.Rabenhorst 1868
Helierella pecten (Ehrenberg) Kuntze 1891
Euastrum oblongum var. depauperatum West & G.S.West 1905
Description: The cells are appr. 2 times longer than wide and slenderly elliptical in shape. The cell halves consists of two clearly distinguishable sets of lobes which are weakly concave in the center. The vertex lobes are clearly contrasted, widened wedge-shaped with a cut in the center. The cuts in the middle of the cell are not peripherally widened. There exists a big pore in the middle of the cell halves between the two humps. Further humps are visible at the lateral lobes. The cell wall is covered with densely packed pores.
Dimension: Length (100)–140–180–(205) µm, width (45)–65–85–(110) µm, L/W 1.7–2.2–(2.6).
Occurrence: Adaptable alga, ubiquitous.
Left: Original graphic by Prof. Lenzenweger.
Right: Photomicrograph by Prof. Lenzenweger. For microphotography, the microscope illumination was adjusted in such a way that as many features as possible that are important for species identification are prominently displayed.
Copyright by Prof. Rupert Lenzenweger, Ried im Innkreis, Austria.
© Wolfgang Bettighofer,
images under Creative Commons License V 3.0 (CC BY-NC-SA).
For permission to use of (high resolution) images please contact postmaster@protisten.de.
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