Algae World: Phycological Research

Amphora arcus

drawings made in 1989 and 1990 from material from the sublittoral of the marine sea-loch, Loch Goil (north-west of Glasgow, Scotland; material collected by Richard Park, observations by David Mann), and published in

Mann, D.G. (1994). The systematics of amphoroid diatoms: the life history of Amphora arcus. Nova Hedwigia 58: 335-352.

• sheet 1 vegetative cells, 31 March 1989
  
• sheet 2 vegetative cells, 1 January 1990
• sheet 3 paired cells, gametes and zygotes
  
• sheet 4 initial cells, 27 April 1989
  
• sheet 5 zygotes and auxospores, 19 March 1990
  
• sheet 6 zygotes and initial cells, 16 March 1990
  
• sheet 7 auxospores and initial cells, 19 March 1990
  
• sheet 8 initial cell and perizonium, 19 March 1990
  
• sheet 9 zygotes, auxospores, initial cells and longitudinal perizonium, 19 March 1990