Heterosphaeridium? heteracanthum (Deflandre and Cookson, 1955, p.276, pl.2, figs.5-6; text-figs.40-41) Eisenack and Kjellström, 1972, p.451.
TYPE: Holotype: Deflandre and Cookson, 1955, pl.2, fig.5. HISTORY: Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Cleistosphaeridium, fourthly Heterosphaeridium, fifthly (and now) Heterosphaeridium?. Questionable assignment: Stover and Evitt (1978, p.52). AGE: ?Late Cretaceous-Early Eocene.
Infraspecific taxa: Go up one level. DINOFLAJ (c) 1998 |