Triblastula nuda
From dinoflaj2
"nuda" Wetzel, 1961, p.340, pl.2, fig.2. Holotype: Wetzel, 1961, pl.2, fig.2. Originally Triblastula, subsequently Hystrichosphaeropsis. Taxonomic senior synonym: Triblastula (as and now Hystrichosphaeropsis) quasicribrata, according to Marheinecke (1992, p.44). Age: ?Late Cretaceous (erratic).
Parent: Triblastula