Heslertonia cylindrata
From dinoflaj3
cylindrata Yun Hyesu, 1981, p.72, pl.8, figs.3a–b,11; text-figs.15a–b. Holotype: Yun Hyesu, 1981, pl.8, figs.3a–b; text-figs.15a–b; Fensome et al., 1991, figs.1–4 — p.637. Age: early Santonian.
Parent: Heslertonia