Hystrichosphaeridium tribrachiosum

"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