Cosmarium
Cosmarium | ||||||||||||
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Cosmarium ochthodes (size: 62 µm × 47 µm) |
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Systematics | ||||||||||||
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Scientific name | ||||||||||||
Cosmarium | ||||||||||||
Ralfs |
Cosmarium (of gr. Kosmarion = "small jewelry") is the name of a relative with about 1,000 representatives described species-rich genus of ornamental algae . The genus belongs to the Desmidiaceae family.
description
Cosmarien consist of two half-cells, usually 5 to 50 µm in size, which are connected by a so-called isthmus , which contains the cell nucleus . In contrast to the similar genus Micrasterias , the often kidney-shaped half-cells are not incised or lobed. However, the cell walls of numerous species are sculptured in a characteristic way, so that empty cell walls of dead Cosmaria are used as identifying features .
In contrast to the cell walls of the similar genera Staurodesmus , Staurastrum and Xanthidium, they never have spines. In addition to these features, the cell size, width and their ratio serve as important identifying features. Cosmarien usually occur in relatively clean, soft water and therefore belong e.g. B. on the flora of the moors . Species such as Cosmarium cucurbita and Cosmarium pygmaeum are considered sphagnophilic . In addition to species that are closely tied to certain living conditions , there are others that are more common and z. B. colonize small ponds or damp earth, gravel and sand places. Since biotopes with clean, soft water have become rarer, numerous Cosmarium species are now endangered species (see Red List of Endangered Species ).
Representative
- Cosmarium angulosum Bréb.
- Cosmarium auriculatum Reinsch
- Cosmarium bioculatum Bréb. ex Ralfs
- Cosmarium bisphaericum Printz
- Cosmarium blyttii will
- Cosmarium borgesenii
- Cosmarium botrytis Menegh. ex Ralfs
- Cosmarium contractum Kirchn.
- Cosmarium costatum Nordst.
- Cosmarium cucumis Corda ex Ralfs
- Cosmarium debaryi W.Archer
- Cosmarium dentatum
- Cosmarium depressum
- Cosmarium dilatatum Lütkem.
- Cosmarium elegantissimum P.Lundell
- Cosmarium exiguum W.Archer
- Cosmarium fontarabiense
- Cosmarium fontrabiense
- Cosmarium formosulum Hoff
- Cosmarium furcatospermum W.West & GSWest
- Cosmarium granatum Bréb. ex Ralfs
- Cosmarium hammeri Reinsch
- Cosmarium humile (F.Gay) Nordst.
- Cosmarium impressulum Elfving
- Cosmarium isthmium W.West
- Cosmarium laeve Rabenh.
- Cosmarium levinotabile
- Cosmarium lundellii Delponte
- Cosmarium norimbergense
- Cosmarium obsoletum (Hantzsch) Reinsch
- Cosmarium obtusatum Schmidle
- Cosmarium ochthodes Nordst.
- Cosmarium oval Ralfs ex Ralfs
- Cosmarium pachydermum P. Lundell
- Cosmarium premorsum
- Cosmarium pseudoconnatum Nordst.
- Cosmarium quadrum P. Lundell
- Cosmarium rectangulare Grunow
- Cosmarium reniforme (Ralfs) W.Archer
- Cosmarium sexangulare P. Lundell
- Cosmarium sp. ACKU 1232
- Cosmarium subcostatum Nordst.
- Cosmarium subcucumis Schmidle
- Cosmarium subprotumidum Nordst.
- Cosmarium subtumidum Nordst.
- Cosmarium succissum W. West
- Cosmarium tenue W.Archer
- Cosmarium trilobulatum Reinsch
- Cosmarium tumidum P. Lundell
- Cosmarium undulatum Corda
- Cosmarium vexatum W. West
literature
- Urania plant kingdom . Volume 2: Moose, Farne, Nacktsamer, 1st edition 1992, Urania-Verlag, Leipzig 1992, ISBN 3-332-00495-6
Web links
- Article about ornamental algae with numerous pictures
- Films about Cosmarien
- Pictures of different Cosmarien
- Red lists online query for the FRG and all federal states
- Red lists of endangered biotope types, animal and plant species and plant communities in Germany (Federal Agency for Nature Conservation)