Heslertonia heslertonensis
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*heslertonensis (Neale and Sarjeant, 1962, p.440–441, pl.19, fig.5; pl.20, fig.5; text-figs.1a–b) Sarjeant, 1966b, p.133. Emendation: Duxbury, 1980, p.124, as Heslertonia heslertonensis. Holotype: Neale and Sarjeant, 1962, pl.19, fig.5; text-figs.1a–b. Originally Gonyaulax (Appendix B), subsequently (and now) Heslertonia. Age: Hauterivian.
