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Ginginodinium spinulosum
Ginginodinium spinulosum Cookson and Eisenack, 1960
Holotype: Cookson and Eisenack, 1960, pl.2, fig.9
Locus typicus: Perth Basin, Australia
Stratum typicum: Late Albian-Cenomanian
Original descriptoin: Cookson and Eisenack, 1960, p.7
Shell dividedby a strongly helicoid girdle into a triangular epitheca, which tappers to a small but distinct hollow horn with a small terminal "plug", and a trapezoidal hypotheca with two hollow divergent horns of unequal size, the larger being on the right-hand side of the observer when the ventral surface is uppermost. The borders of the longitudinal furrow curve ouward towards the antapical horns; the flagellum pore is sometimes evident in the longitudinal furrow. The shell membrane is densely spinulate. A clear defined pylome is not represented, but in most specimens the dorsal wall of the epitheca is broken near the base of the horn as if forming a natural opening.
Dimensions: Holotype: 72 µm long, 64 µm broad. Range: 62-71x54-62 µm.
Holotype: Cookson and Eisenack, 1960, pl.2, fig.9
Locus typicus: Perth Basin, Australia
Stratum typicum: Late Albian-Cenomanian
Original descriptoin: Cookson and Eisenack, 1960, p.7
Shell dividedby a strongly helicoid girdle into a triangular epitheca, which tappers to a small but distinct hollow horn with a small terminal "plug", and a trapezoidal hypotheca with two hollow divergent horns of unequal size, the larger being on the right-hand side of the observer when the ventral surface is uppermost. The borders of the longitudinal furrow curve ouward towards the antapical horns; the flagellum pore is sometimes evident in the longitudinal furrow. The shell membrane is densely spinulate. A clear defined pylome is not represented, but in most specimens the dorsal wall of the epitheca is broken near the base of the horn as if forming a natural opening.
Dimensions: Holotype: 72 µm long, 64 µm broad. Range: 62-71x54-62 µm.