Coscinodiscophyceae

Coscinodiscophyceae
Aulacoseira granulata
Systematics
Stramenopiles (stramenopiles) Department : Diatoms (Bacillariophyta) Class : Coscinodiscophyceae
Scientific name
Coscinodiscophyceae
Round & RMCrawford

The Coscinodiscophyceae are a class of diatoms . They used to be called centric diatoms (Centralis). However, there are also radial to bilaterally symmetrical representatives, the Cymatosiraceae are an example of this. All species belong to the plankton. They have lots of small chloroplasts . In the vegetative stage they are immobile. Only the spermatozoids, i.e. the male gametes , can move with the help of an apical flagella . They fuse with a female egg and a so-called auxospore is created . Stages of rest are also formed by many species. These are formed by algae in the vegetative state and differ morphologically from the vegetative cells .

Systematics

The Coscinodiscophyceae are currently divided into four subclasses with a total of 16 orders . (As of May 2017)

• Subclass Archaegladiopsophycidae Nikolaev & Harwood - a total of 79 species
  • Archaegladiopsidales Nikolaev & Harwood - 12 species
  • Gladiales Nikolaev & Harwood - 9 types
  • Stephanopyxales Nikolaev - 57 species
• Subclass Corethrophycidae Round & RMCrawford - a total of 9 species
  • Corethrales Round & RMCrawford
• Subclass Coscinodiscophycidae Round & RMCrawford - a total of 624 species
  • Arachnoidiscales Round
  • Asterolamprales Round - 46 species
  • Coscinodiscales Round - 506 species
  • Ethmodiscales Round - 2 types
  • Paraliales R.M. Crawford - 5 species
  • Stellarimal Nikolaev & Harwood - 14 species
  • Stictocyclales Round
  • Stictodiscales Round & RMCrawford - 51 species
  • Triceratiales Round & RMCrawford - 93 species
• Subclass Melosirophycidae E.J. Cox - a total of 165 species
  • Melosirales R.M. Crawford

literature

• Sina M. Adl, Alastair GB Simpson, Mark A. Farmer, Robert A. Andersen, O. Roger Anderson, John A. Barta, Samual S. Bowser, Guy Bragerolle, Robert A. Fensome, Suzanne Fredericq, Timothy Y. James, Sergei Karpov, Paul Kugrens, John Krug, Christopher E. Lane, Louise A. Lewis, Jean Lodge, Denis H. Lynn, David G. Mann, Richard M. McCourt, Leonel Mendoza, Øjvind Moestrup, Sharon E. Mozley-Standridge, Thomas A. Nerad, Carol A. Shearer, Alexey V. Smirnov, Frederick W. Spiegel, Max FJR Taylor: The New Higher Level Classification of Eukaryotes with Emphasis on the Taxonomy of Protists. The Journal of Eukaryotic Microbiology 52 (5), 2005; Pages 399-451. doi : 10.1111 / j.1550-7408.2005.00053.x .
• Robert Hofrichter (Ed.): The Mediterranean II / 1 , 2003, ISBN 3827410908

Individual evidence

1. ^ Robert Hofrichter (Ed.): The Mediterranean II / 1 , 2003, ISBN 3827410908
2. ↑ Coscinodiscophyceae - In: Guiry, MD; Guiry, GM: AlgaeBase. National University of Ireland, Galway, last accessed February 3, 2016.

Web links

Commons : Coscinodiscophyceae  - collection of images, videos and audio files