FIGURES 47–54 in Auxosporulation, morphology of vegetative cells and perizonium of Fallacia tenera (Hust.) D.G. Mann (Bacillariophyceae)

FIGURES 47–54: The incunabula and perizonium of Fallacia tenera. Scale bars = 2 µm, except Figs 47, 50, 51 (5 µm). Fig. 47. Paring of two auxospores with two parental cells valves in different size. Fig. 48. Perizonium investing the initial cell, note the primary transverse band (arrow). Fig. 49. "Suture" of secondary transverse perizonial bands (arrow) and closed primary band (double arrows). Fig. 50. Detial of primary transverse band (arrow) with an incunabular scale (double arrows) on the surface. Fig. 51. The longitudinal series of perizonial bands. Note the semilanceolate secondary bands (arrow) with a slightly convex outline in the center (arrowhead). Fig. 52. The detail of fig. 51. Showing the one side fimbriate margin of secondary longitudinal bands and lanceolate primary longitudinal band (double arrows). Figs 53, 54. Incunabular scales (arrow) on the terminal and on the primary transverse band.