Sumatradinium cephalum
From dinoflaj3
"cephalum" (Kar, 1979, p.34, pl.4, figs.66a–b,67) Jain, 1980, p.141. Holotype: Kar, 1979, pl.4, figs.66a–b. Originally Polysphaeridium, subsequently Sumatradinium, thirdly Batiacasphaera?. Taxonomic senior synonym: Operculodinium placitum, according to Jain and Garg (1991, p.81). N.I.A. Age: Oligocene.
Parent: Sumatradinium