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Hystrichosphaeridium vasiformum

"Hystrichosphaeridium vasiformum" Neale and Sarjeant, 1962, p.452, pl.20, fig.1; text-fig.8b.

TYPE: Holotype: Neale and Sarjeant, 1962, pl.20, fig.1; text-fig.8b.

HISTORY: NOW: Oligosphaeridium. Originally Hystrichosphaeridium, subsequently (and now) Oligosphaeridium.

SYNONYM(S): Taxonomic senior synonym: Hystrichosphaeridium (as Oligosphaeridium?) asterigerum, according to Duxbury (1977, p.45) - however, McIntyre and Brideaux (1980, p.21) retained Hystrichosphaeridium (as Oligosphaeridium) vasiforme. Taxonomic junior synonym: Hystrichosphaeridium (as Oligosphaeridium) macrotubulum, according to McIntyre and Brideaux (1980, p.21).

AGE: mid Hauterivian-Early Eocene.


Infraspecific taxa:


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