Thoracosphaera atlantica Appendix B
From dinoflaj3
"atlantica" Haq and Lohmann, 1976, p.183, pl.3, figs.11–12. Holotype: Haq and Lohmann, 1976, pl.3, fig.13. Taxonomic senior synonym: Thoracosphaera (now Operculodinella) operculata, according to Fütterer (1990, p.540). Age: Paleocene–Eocene.
Parent: Thoracosphaera_Appendix B