Desmids –
Archaeplastida (Part)
Observations on Micrasterias rotata
Gallery Prof. Rupert Lenzenweger
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Micrasterias rotata Ralfs 1848
Most likely ID: n.a.
Basionym: n.a.
Add’l Synonyms: Echinella rotata Greville 1833
Cosmarium stellinum Corda 1835
Eutomia rotata (Greville) Harvey 1841
Micrasterias rotata f. granulata West 1892
Micrasterias rotata f. evoluta W.B.Turner 1893
Micrasterias rotata var. pulchra Lemmermann 1896
Micrasterias rotata var. evoluta (W.B.Turner) Willi Krieger 1939
Description: The cells are (1.0)–1.05–1.15–(1.2) times longer than wide, the shape seems almost circular or wide elliptical. The cell is devided into lobes due to deep cuts, the terminations of lobes are denticulated. The central lobe is broadened evenly at the end. The termination is formed concavely and is lightly arched upwards at both sides. The lateral angles of the central lobe are little denticulated. The cut in the middle of the cell (sinus) is very deep and peripherally a little widened. The cell wall is densly punctuated by tiny pores. The Chromatophores have several scattered pyrenoids with varying sizes.
Dimension: Length (200)–220–300–(345) µm, width (160)–190–270–(305) µm.
Occurrence: This specie is very tolerant concerning living conditions. Therefore the species is widely spread in all altitudes, in forestal ditches and lowland fens sometimes abundant.
Original graphic by Prof. Lenzenweger.
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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striolatum
teliferum
pseudopyramidatum
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scabrum
capitulum
forficulatum
oligacanthum
var. incisum
chlamydosporum
arcuatum
var. subavicula
truncata
var. quadrata
rubescens
venustum
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ralfsii
var. montanum
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digitus
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intermedium
dissiliens
kuetzingii
ralfsii
var. hybridum
aureus
botrytis
quadratum
quadrum
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