Didinium
| Didinium | ||||||||||||
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Didinium nasutum , drawing by Schewiakoff , 1896 |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Didinium | ||||||||||||
| Stein , 1859 |
Didinium , German nose animals is a genus of single-celled organisms of the strain of ciliates ( Ciliophora ). They feed largely on paramecia .
features
Didinium is approximately egg-shaped to barrel-shaped, broadly rounded at the rear end, flattened at the front mouth area and with a briefly raised conical extension.
A belt of two narrow rows of eyelashes stretches around the center of the cell , the kinetosomes of which are arranged diagonally to the body axis. Another such eyelash belt runs at the front end directly on the "shoulder", the edge to the front of the mouth. The rest of the cell is largely unlashed.
The mouth opening is not permanent, but is only designed for food intake; for this purpose it can widen extremely. The macronucleus is shaped like a sausage or horseshoe, the contractile vacuole is at the rear end.
species
- Didinium aiveolatum
- Didinium armatum
- Didinium balbiani
- Didinium chlorelligerum
- Didinium cinctum
- Didinium faurei
- Didinium gargantua
- Didinium imprint
- Didinium nasutum
- Didinium rostratum
proof
- Xu Kaiqin: The World of Protozoa, Rotifera, Nematoda and Oligochaeta , genus entry online , accessed November 13, 2009
