Micrhystridium tubulatum Appendix A
From dinoflaj2
"tubulatum" Menéndez, 1965, p.13, pl.2, fig.7; pl.3, fig.17. Holotype: Menéndez, 1965, pl.2, fig.7. NOW Oligosphaeridium?. Originally Micrhystridium, subsequently (and now) Oligosphaeridium?. Age: Oligocene.
Parent: Micrhystridium