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Maghrebinia membraniphora
Maghebinia "membraniphora" (Cookson and Eisenack, 1962b, p.495, pl.6, figs.8-14) Below, 1981a, p.22.
NOW Cauveridinium. Originally Cyclonephelium, subsequently Maghrebinia, thirdly (and now) Cauveridinium.
Holotype: Cookson and Eisenack, 1962b, pl.6, fig.9.
Age: Albian-Cenomanian.
Original description: Cookson and Eisenack, 1962, p.495: Cyclonephelium membraniphorum
Shell apparently concavo-convex, circular to subcircular in outline. Circumferential border zone delimited by two thin membranes of equal width, each of which is supported by rather widely spaced, equidistant, radial fibres. These fibres arise from the peripheral surfaces of the shell, and their bases are connected with another tangentially. They are simple or capitate and relatively stout. Sometimes fine radial striae cross the width of the membranes, in which cases the edge appear to be finely toothed. Occasionally a union between opposing fibres may occur, with the formation of wide funnel-like structures. The sculpture of the shell varies from very finely to coarsly granular.
NOW Cauveridinium. Originally Cyclonephelium, subsequently Maghrebinia, thirdly (and now) Cauveridinium.
Holotype: Cookson and Eisenack, 1962b, pl.6, fig.9.
Age: Albian-Cenomanian.
Original description: Cookson and Eisenack, 1962, p.495: Cyclonephelium membraniphorum
Shell apparently concavo-convex, circular to subcircular in outline. Circumferential border zone delimited by two thin membranes of equal width, each of which is supported by rather widely spaced, equidistant, radial fibres. These fibres arise from the peripheral surfaces of the shell, and their bases are connected with another tangentially. They are simple or capitate and relatively stout. Sometimes fine radial striae cross the width of the membranes, in which cases the edge appear to be finely toothed. Occasionally a union between opposing fibres may occur, with the formation of wide funnel-like structures. The sculpture of the shell varies from very finely to coarsly granular.