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Baltisphaeridium atavum
Baltisphaeridium atavum, (Naumova, 1968), Fensome et al., 1990
Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium. Since Naumova, 1968, in a citation in her plate caption, referred to this species as Baltisphaeridium atavum, Fensome et al., 1990 validated the combination since this Cambrian species is clearly not assignable to Hystrichosphaeridium Deflandre, 1937.
Holotype: Naumova, 1968, pl.2, fig.11
Age: Cambrian
Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium. Since Naumova, 1968, in a citation in her plate caption, referred to this species as Baltisphaeridium atavum, Fensome et al., 1990 validated the combination since this Cambrian species is clearly not assignable to Hystrichosphaeridium Deflandre, 1937.
Holotype: Naumova, 1968, pl.2, fig.11
Age: Cambrian