Colacium
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| Ehrenberg |
Colacium is an algae - genus from the root of the Euglenozoa .
description
Colacium forms spherical to elliptical, fixed cells with a length of 10 to 30 µm, which are usually attached to zooplankton with a gelatinous stalk. Tree-like branched colonies are also possible. An extraplastidic eye-spot and a contractile vacuole are located near the attachment site. In the cell there are several, mostly lens-shaped plastids with pyrenoid and paramylon granules as storage material. The cells have no cell wall but a pellicle . The cells are able to become swarmers by forming flagella and detaching themselves from the substrate. In the swarming stage they resemble the genus Euglena
Reproduction
The asexual reproduction occurs by cell division. The daughter cells become swarmers and colonize new substrates; tree-like branched colonies can also form. Sexual reproduction is unknown.
distribution
Colacium lives mainly on zooplankton, mostly in stagnant eutrophic waters.
species
- Colacium arbuscula stone
- Colacium arcuatum Playfair
- Colacium calvum stone
- Colacium elongatum Playfair
- Colacium epiphyticum F.E. Fritsch
- Colacium gojdiscae (Prescott) Huber-pestalozzi
- Colacium mucronatum Bourrelly & Chadefaud
- Colacium oval Playfair
- Colacium parasiticum (Sokolov) Huber-Pestalozzi
- Colacium sanguineum Lackey
- Colacium simplex Huber-Pestalozzi
- Colacium vesiculosum Ehrenberg , the type species
swell
- Karl-Heinz Linne von Berg, Michael Melkonian u. a .: The Kosmos algae guide. The most important freshwater algae under the microscope. Kosmos, Stuttgart 2004, ISBN 3-440-09719-6 .