Hystrichosphaeridium tribrachiosum

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"tribrachiosum" Tasch in Tasch et al., 1964, p.195, pl.1, fig.3.  Holotype: Tasch et al., 1964, pl.1, fig.3.  Originally Hystrichosphaeridium, subsequently Polysphaeridium?.  Taxonomic senior synonym: Hystrichosphaeridium (now Kiokansium) unituberculatum, according to Stover and Evitt (1978, p.267).  Age: Albian.

Parent: Hystrichosphaeridium