Cleistosphaeridium? multifurcatum, (Deflandre, 1937), Davey et al., 1969

Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Cleistosphaeridium, fourthly Cleistosphaeridium?, subsequantly (and now) Heterosphaeridium.
Stover and Evitt, 1978, considered this to be a provisionally accepted species of Cleistosphaeridium.
This combination was not validly published in Davey et al., 1966, since these authors did not fully reference the basionym.

Holotype: Deflandre, 1937, pl.16 (al. pl.13), figs.1-2; Fensome et al., 1991, figs.1-2 - p.691; fig.1 - p.693
Locus typicus: Paris, France
Stratum typicum: Late Cretaceous

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Original description: [Deflandre, 1937, p. 76]: (Translation: Fensome, 1991, p. 692):

Description:
This is a collective species, susceptible to being later dismembered. Thus, under this name, I include all globular Hystrichosphaeridium covered with numerous branched processes, whose height does not exceed one quarter of the diameter of the shell and is very often less. Generally all the processes are branched, but the type, illustrated here, shows some with simple pointed extremities.
The surface is entirely reticulate, or covered with a sort of vermiculate ornamentation which cannot be analysed except at very high magnification.