Bacillaria

Bacillaria paradoxa

Bacillaria is a genus of diatoms ( Bacillariophyta ) with about 4 species, one of which, Bacillaria paradoxa, in fresh water, the other occurring in sea water.

Features

The representatives form highly motile colonies. The cells have the typical diatom shell of two counters. The shell is oblong in side view, in valve view linear. On the shell surface they are connected to their neighbors. They have two disc-shaped plastids, which are colored by fucoxanthin golden brown. The plastids leave this center where the nucleus is located.

Asexual reproduction occurs by the typical dichotomy of diatoms. Sexual reproduction is not known. For Bacillaria paradoxa apogamy described, the formation zygotenähnlicher stages without Gametenverschmelzung.

Occurrence

Bacillaria paradoxa lives in sediment and plankton of freshwater, preference is given to those with higher salt content. The remaining species are marine inhabitants.

Documents

• K.-H. Linne von Berg, K. Hoef -Emden, B. Marin, M. Melkonian: The Cosmos algae leader. The main freshwater algae under the microscope. Kosmos, Stuttgart 2004, pp. 240, ISBN 3-440-09719-6