Oligosphaeridium vasiformum
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vasiformum (Neale and Sarjeant, 1962, p.452, pl.20, fig.1; text-fig.8b) Davey and Williams, 1966b, p.74–75. Holotype: Neale and Sarjeant, 1962, pl.20, fig.1; text-fig.8b; Fauconnier and Masure, 2004, pl.62, fig.4. 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) vasiformum. Taxonomic junior synonym: Hystrichosphaeridium (as Oligosphaeridium?) macrotubulum, according to McIntyre and Brideaux (1980, p.21). Age: middle Hauterivian–early Barremian.
Parent: Oligosphaeridium