"Cordosphaeridium? difficile" (Manum and Cookson, 1964, p.12-14, pl.3, figs.1-3,7) Davey and Williams, 1966b, p.91.
TYPE: Holotype: Manum and Cookson, 1964, pl.3, fig.1. STATUS: Combination not validly published: basionym not fully referenced. HISTORY: NOW: Heterosphaeridium. Originally Hystrichosphaeridium, subsequently Cordosphaeridium? (combination not validly published), thirdly (and now) Heterosphaeridium. Questionable assignment: Davey and Williams (1966b, p.91). AGE: Cenomanian.
Infraspecific taxa: Go up one level. DINOFLAJ (c) 1998 |