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Silicisphaera buspina
Silicisphaera buspina Davey and Verdier, 1976
Now Florentinia. Originally Silicisphaera, subsequently (and now) Florentinia.
Holotype: Davey and Verdier, 1976, pl.2, figs.1-3
Paratype: Davey and Verdier, 1976
Locus typicus: Loffre Borehole, Nord, France
Stratum typicum: Senonian
Original diagnosis: Davey and Verdier, 1976, p.321-322
The wall of the spherical to subspherical cyst is densely granular and bears thin-walled processes of variable size and approximately equal length. They are faintly striate, wide proximally, generally truncated distally and number basically one per reflected plate area. Simple, bifurcating, trifurcating and complex processes are present. The largest complex processes are very noticeable and occupy the postcingular region; usually three are present. The antapical process is not distinctive. The archaeopyle is formed by the loss of precingular plate 3"; incipient breakage between the apical and precingular plate senes may also be present.
Dimensions: Range: Central body diameter: 43-57 µm; length of processes: 18-27 µm.
Original description: Davey and Verdier, 1977, p. 322
In all general features S. buspina resembles S. ferox. The noticeably thickened and more granular areas are present beneath the processes thus making the sutural areas easily discernible The simple processes taper rapidly above their broad bases, then more gradually to usually a truncated distal extremity. Occasionally one or more of the sulcal processes appears to be acuminate. The compound processes divide medially; the bifurcate ones occupy the apical and sulcal regions and the trifurcate processes are pre- and postcingular. The complex processes similarly occupy the pre- and postcingular regions; however the extremely large ones, usually three in number, are postcingular and appear to occupy plates 3""", 4""" and 5""". These either divide into several truncated tubules distally or are rounded distally and bear a crown of tubules.
Davey and Verdier, 1976, p. 322: S. buspina is very similar to S. ferox except that it possesses complex processes, the postcingular ones being extremely large and immediately obvious.
Now Florentinia. Originally Silicisphaera, subsequently (and now) Florentinia.
Holotype: Davey and Verdier, 1976, pl.2, figs.1-3
Paratype: Davey and Verdier, 1976
Locus typicus: Loffre Borehole, Nord, France
Stratum typicum: Senonian
Original diagnosis: Davey and Verdier, 1976, p.321-322
The wall of the spherical to subspherical cyst is densely granular and bears thin-walled processes of variable size and approximately equal length. They are faintly striate, wide proximally, generally truncated distally and number basically one per reflected plate area. Simple, bifurcating, trifurcating and complex processes are present. The largest complex processes are very noticeable and occupy the postcingular region; usually three are present. The antapical process is not distinctive. The archaeopyle is formed by the loss of precingular plate 3"; incipient breakage between the apical and precingular plate senes may also be present.
Dimensions: Range: Central body diameter: 43-57 µm; length of processes: 18-27 µm.
Original description: Davey and Verdier, 1977, p. 322
In all general features S. buspina resembles S. ferox. The noticeably thickened and more granular areas are present beneath the processes thus making the sutural areas easily discernible The simple processes taper rapidly above their broad bases, then more gradually to usually a truncated distal extremity. Occasionally one or more of the sulcal processes appears to be acuminate. The compound processes divide medially; the bifurcate ones occupy the apical and sulcal regions and the trifurcate processes are pre- and postcingular. The complex processes similarly occupy the pre- and postcingular regions; however the extremely large ones, usually three in number, are postcingular and appear to occupy plates 3""", 4""" and 5""". These either divide into several truncated tubules distally or are rounded distally and bear a crown of tubules.
Davey and Verdier, 1976, p. 322: S. buspina is very similar to S. ferox except that it possesses complex processes, the postcingular ones being extremely large and immediately obvious.