Algae World: Phycological Research

Dickieia

drawings made in March 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). Auxospore formation, reproductive plasticity and cell structure in Navicula ulvacea and the resurrection of the genus Dickieia (Bacillariophyta). European Journal of Phycology 29: 141-157.

• sheet 1 vegetative cells and paired
• sheet 2 paired cells and meiotic prophase
• sheet 3 gametogenesis and plasmogamy
• sheet 4 meiotic prophase and gametogenesis
• sheet 5 gametogenesis
• sheet 6 gametogenesis and plasmogamy
• sheet 7 plasmogamy
• sheet 8 auxospore development, including haploid parthenogenesis
• sheet 9 zygotes and auxospore development
• sheet 10 mitotic cell division, meiotic prophase, zygotes, auxospore development
• sheet 11 plasmogamy, auxospore deveopment
• sheet 12 auxospore development and initial cell formation
• sheet 13 auxospore and initial cell devlopment, including polyploid
• sheet 14 initial cell formation
• sheet 15 initial cells and haploids
• sheet 16 premitotic development, auxospores
• sheet 17 gametogenesis and auxospore development
• sheet 18 plasmogamy
• sheet 19 plasmogamy
• sheet 20 plasmogamy and initial cell formation
• sheet 21 zygotes
• sheet 22 zygote, initial cell