Bacillariophycidae

Fig 1: Schematic drawing of Pseudo-nitzschia pungens showing two closely packed rows of poroids.

Fig 1: Pseudonitzschia multiseries Schematic drawing of the cell with detailed arrangement in the valve view.

Fig 2: Pseudonitzschia multiseries Scanned electron micrograph showing detail of the stria, poroids and fibulae.

Fig 3: Pseudonitzschia multiseries Scanned electron micrograph image showing detailed stria, fibulae and poroids.

Fig 4: Pseudonitzschia multiseries Scanned electron micrograph image showing detail of the stria.

Fig 1: Schematic drawings of Chaetoceros socialis chains; a. vegetative cells, b. cells producing resting spores.

Fig 2: Lugol's stained colony of cells

Fig 3: Part of a live colony showing some cells and a strand of several long setae (arrow) connecting different chains in the colony

Fig 6: Large colony of C. socialis cells under light microscope.

Fig 8: Small colony of C. socialis cells under light microscope.

Fig 1: Schematic drawing of Chaetoceros convolutus

Fig 1: Schematic drawing of Chaetoceros concavicornis

Fig 1: Schematic drawing of the cell in the valve view.

Fig 2: Electron micrograph image showing detail of the striae and fibulae

Fig 3: Electron micrograph image of the valve end showing detail of the poroids, fibulae and striae.

Fig 4: Electron micrograph image showing detail of the striae.