Polysphaeridium perovatum

"?perovatum" (Tasch in Tasch et al., 1964, p.194, pl.3, fig.13) Davey and Williams, 1969, p.6.  Holotype: Tasch et al., 1964, pl.3, fig.13.  Originally Hystrichosphaeridium, subsequently Polysphaeridium?.  Taxonomic senior synonym: Hystrichosphaeridium (as and now Kiokansium) unituberculatum, according to Stover and Evitt (1978, p.76).  Questionable assignment: Davey and Williams (1969, p.6).  This combination, as a questionable assignment, was not validly published in Davey and Williams (1966b, p.95), since these authors did not fully reference the basionym.  Age: Albian.

Parent: Polysphaeridium