Impletosphaeridium tribuliferum
From dinoflaj3
"tribuliferum" (Sarjeant, 1962a, p.487–488, pl.70, fig.4; text-figs.6c,7) Islam, 1993, p.87. Holotype: Sarjeant, 1962a, pl.70, fig.4; Fauconnier and Masure, 2004, pl.23, fig.11. NOW Downiesphaeridium. Originally Baltisphaeridium (Appendix A), subsequently Cleistosphaeridium, thirdly Cleistosphaeridium?, fourthly Impletosphaeridium, fifthly (and now) Downiesphaeridium. Age: Oxfordian.
Parent: Impletosphaeridium