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Eurydinium eyrense
Eurydinium eyrense (Cookson and Eisenack, 1971) Stover and Evitt, 1978
Originally Deflandrea, subsequently (and now) Eurydinium. See also Alterbia? (combination illegitimate).
Holotype: Cookson and Eisenack 1971: Pl. 7, fig. 3
Locus typicus: Eyre Bore No. 1 core 20, Western Australia.
Stratum typicum: Mid-Cretaceous
Age: Albian-Cenomanian
Original description: Cookson and Eisenack 1971, p. 217-218: Deflandrea eyrensis
Shell considerably longer than broad, resembling in that respect D. bakeri Deflandre and Cookson (1955) and D. scheii Manum (1963). Epitheca longer than the hypotheca, dome-shaped with a very short centrally-placed apical horn. Hypotheca with convex sides which slant towards a very short antapical prominence situated towards the lefthand side of the dorsal surface. Girdle circular and rather broad (Pl. 7, fig. 3). Wall of shell thin, slightly to rather coarsely and densely granular especially in the upper portion of the epitheca. Capsule relatively large, roughly oval in shape but not reaching the lateral walls of the shell. Surface closely granular varying somewhat in the degrees of density. Archeopyle relatively small, when clearly developed, as in the holotype, six-sided.
Dimensions: Holotype--shell c. 90Á x 56Á, capsule c. 60Á x 60Á. Range from shell c. 72Á x 45Á, capsule c. 48Á x 42Á to shell c. 121 Á x 82Á, capsule c. 80Á x 60Á.
Comment: Cookson and Eisenack 1971, p. 217-218
D. eyrensis has occurred frequently in preparations of the Eyre deposit core 20. As the illustrations show, a considerable degree of variation both in the density and coarseness of the ornament of the shell occurs.
Originally Deflandrea, subsequently (and now) Eurydinium. See also Alterbia? (combination illegitimate).
Holotype: Cookson and Eisenack 1971: Pl. 7, fig. 3
Locus typicus: Eyre Bore No. 1 core 20, Western Australia.
Stratum typicum: Mid-Cretaceous
Age: Albian-Cenomanian
Original description: Cookson and Eisenack 1971, p. 217-218: Deflandrea eyrensis
Shell considerably longer than broad, resembling in that respect D. bakeri Deflandre and Cookson (1955) and D. scheii Manum (1963). Epitheca longer than the hypotheca, dome-shaped with a very short centrally-placed apical horn. Hypotheca with convex sides which slant towards a very short antapical prominence situated towards the lefthand side of the dorsal surface. Girdle circular and rather broad (Pl. 7, fig. 3). Wall of shell thin, slightly to rather coarsely and densely granular especially in the upper portion of the epitheca. Capsule relatively large, roughly oval in shape but not reaching the lateral walls of the shell. Surface closely granular varying somewhat in the degrees of density. Archeopyle relatively small, when clearly developed, as in the holotype, six-sided.
Dimensions: Holotype--shell c. 90Á x 56Á, capsule c. 60Á x 60Á. Range from shell c. 72Á x 45Á, capsule c. 48Á x 42Á to shell c. 121 Á x 82Á, capsule c. 80Á x 60Á.
Comment: Cookson and Eisenack 1971, p. 217-218
D. eyrensis has occurred frequently in preparations of the Eyre deposit core 20. As the illustrations show, a considerable degree of variation both in the density and coarseness of the ornament of the shell occurs.