"Hystrichosphaeridium difficile" Manum and Cookson, 1964, p.12-14, pl.3, figs.1-3,7.
TYPE: Holotype: Manum and Cookson, 1964, pl.3, fig.1. HISTORY: NOW: Heterosphaeridium. Originally Hystrichosphaeridium, subsequently Cordosphaeridium? (combination not validly published), thirdly (and now) Heterosphaeridium. AGE: Cenomanian.
Infraspecific taxa: Go up one level. DINOFLAJ (c) 1998 |