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Hystrichosphaeridium armatum
Hystrichosphaeridium armatum Deflandre, 1937; Emendation: Davey, 1969a, p.153, as Cleistosphaeridium armatum.
NOW Downiesphaeridium. Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Cleistosphaeridium, fourthly (and now) Downiesphaeridium.
Holotype: Deflandre, 1937, pl.16 [al. pl.13], fig.6
Age: Late Senonian
NOW Downiesphaeridium. Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Cleistosphaeridium, fourthly (and now) Downiesphaeridium.
Holotype: Deflandre, 1937, pl.16 [al. pl.13], fig.6
Age: Late Senonian