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Gonyaulacysta eisenackii ssp. oligodentata
Gonyaulacysta eisenackii ssp. oligodentata (Cookson and Eisneack 1958) Sarjeant 1972
Originally Gonyaulax eisenackii ssp. oligodentata, subsequently Gonyaulacysta eisenackii ssp. oligodentata, thirdly Endoscrinium eisenackii ssp. oligodentatum, fourthly Tubotuberella eisenackii ssp. oligodentata.
Tax. jr. synonym of Gonyaulacysta eisenackii ssp. eisenackii (the autonym), according to Sarjeant, 1982.
Holotype: Cookson and Eisenack, 1958, pl.2, fig.11; Jan du Chêne et al., 1986, pl.125, figs.10-11
Locus typicus: Canning Basin, W Australia
Stratum typicum: Late Jurassic
Original description: Cookson and Eisenack, 1958, p.30: Gonyaulax eisenackii ssp. oligodentata
Two specimens agree so well in shape, size and tabulation with G. eisenackii that they can be reffered without doubt to this species. However, they differ from it in the smooth or only minutely and sparingly denticulated sutures of the plates and transverse furrow, and for this reason have been seperated as a subspecies of the type. In the antapical region the outer membrane reaches considerably beyond the end of the body where, supported by 4 long processes, it forms a hollow cylinder.
Dimensions: Type 96x57 Ám; second specimen 100x67 Ám.
Originally Gonyaulax eisenackii ssp. oligodentata, subsequently Gonyaulacysta eisenackii ssp. oligodentata, thirdly Endoscrinium eisenackii ssp. oligodentatum, fourthly Tubotuberella eisenackii ssp. oligodentata.
Tax. jr. synonym of Gonyaulacysta eisenackii ssp. eisenackii (the autonym), according to Sarjeant, 1982.
Holotype: Cookson and Eisenack, 1958, pl.2, fig.11; Jan du Chêne et al., 1986, pl.125, figs.10-11
Locus typicus: Canning Basin, W Australia
Stratum typicum: Late Jurassic
Original description: Cookson and Eisenack, 1958, p.30: Gonyaulax eisenackii ssp. oligodentata
Two specimens agree so well in shape, size and tabulation with G. eisenackii that they can be reffered without doubt to this species. However, they differ from it in the smooth or only minutely and sparingly denticulated sutures of the plates and transverse furrow, and for this reason have been seperated as a subspecies of the type. In the antapical region the outer membrane reaches considerably beyond the end of the body where, supported by 4 long processes, it forms a hollow cylinder.
Dimensions: Type 96x57 Ám; second specimen 100x67 Ám.