Impletosphaeridium varispinosum

varispinosum (Sarjeant, 1959, p.338-340, pl.13, fig.7; text-fig.6) Islam, 1993, p.87.  Holotype: Sarjeant, 1959, pl.13, fig.7; text-fig.6; Fauconnier and Masure, 2004, pl.49, fig.8.  Originally Baltisphaeridium (Appendix A), subsequently Tenua Eisenack, thirdly Sentusidinium, fourthly Sentusidinium?, fifthly Cleistosphaeridium, sixthly (and now) Impletosphaeridium.  Age: Early Callovian.

Parent: Impletosphaeridium