Cleistosphaeridium panniforme
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"panniforme" (Gerlach, 1961, p.196-198, pl.28, fig.13) Stover and Evitt, 1978, p.31. Holotype: Gerlach, 1961, pl.28, fig.13. NOW Impletosphaeridium. Originally Baltisphaeridium, subsequently (and now) Impletosphaeridium, thirdly Cleistosphaeridium. Taxonomic senior synonym: Hystrichosphaeridium (now Cleistosphaeridium) placacanthum, according to Sarjeant (1984b, p.86-87) - however, Eaton et al. (2001, p.191) retained Baltisphaeridium (as and now Impletosphaeridium) panniforme. Age: mid Oligocene.
Parent: Cleistosphaeridium