Conicoidium laevigatum
From dinoflaj2
"laevigatum" Jiabo, 1978, p.46, pl.18, fig.1. Holotype: Jiabo, 1978, pl.18, fig.1. Taxonomic senior synonym: Parabohaidina laevigata, according to Sun Xuekun (1994, p.82). Age: Early Tertiary.
Parent: Conicoidium