Hystrichosphaeridium vasiformum

"vasiformum" Neale and Sarjeant, 1962, p.452, pl.20, fig.1; text-fig.8b.  Holotype: Neale and Sarjeant, 1962, pl.20, fig.1; text-fig.8b; Fauconnier and Masure, 2004, pl.62, fig.4.  NOW Oligosphaeridium.  Originally Hystrichosphaeridium, subsequently (and now) Oligosphaeridium.  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: middle Hauterivian–early Eocene.

Parent: Hystrichosphaeridium