Pyxidicula
| Pyxidicula | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Pyxidicula | ||||||||||||
| Ehrenberg , 1838 |
The pyxidicula are a genus of unicellular , wired amoeba . It comprises eight species and belongs to the Arcellidae family .
features
The hemispherical housings have a mouth opening that is almost as large as the housing diameter, resulting in a bowl shape when viewed from the mouth side. The rim of the mouth opening is curved outwards. The housing is ornamented like a dimple ("areolate") and consists of organic elements that are initially hollow, but with increasing age fill with inorganic material (e.g. manganese ). Older individuals turn brown.
The cell nucleus is of the vesicular type, i.e. it contains only one nucleus . During mitosis , the membrane of the cell nucleus remains as intact as the nucleus, and the spindle apparatus also remains in the nucleus ("closed orthomitosis "). There is a contractile vacuole .
ecology
Pyxidicula live on plants in fresh water, where they feed on algae and bacteria.
Systematics
The genus was first described in 1838 by Christian Gottfried Ehrenberg , the type species is the Pyxidicula operculata, first described by Carl Adolph Agardh in 1827 as a species of the diatom genus Frustulia . The genus includes eight species, including:
proof
- ↑ a b c Ralf Meisterfeld: Arcellinida , In: John J. Lee, GF Leedale, P. Bradbury (Ed.): An Illustrated Guide to the Protozoa . tape 2 . Allen, Lawrence 2000, ISBN 1-891276-23-9 , pp. 827-860 .