Heterosphaeridium spinaconjunctum
From dinoflaj3
spinaconjunctum Yun Hyesu, 1981, p.47, pl.3, figs.8,11–12. Holotype: Yun Hyesu, 1981, pl.3, fig.11; Fensome et al., 1991, fig.2 — p.749; Fauconnier and Masure, 2004, pl.37, figs.1–2. Age: early Santonian.
Parent: Heterosphaeridium