Prolixosphaeridium xanthiopyxides

"?xanthiopyxides" (Wetzel, 1933b, p.44–45, pl.4, fig.25 ex Deflandre, 1937b, p.77) Davey et al., 1969, p.17.  Emendations: Morgenroth, 1968, p.556, as Hystrichosphaeridium? xanthiopyxides; Sarjeant, 1985b, p.142–144, as Tanyosphaeridium xanthiopyxides.  Holotype: Wetzel, 1933b, pl.4, fig.25, Morgenroth, 1968, pl.48, fig.5; Sarjeant, 1985b, pl.3, figs.2–3; Dietz et al., 1999, fig.10, no.8.  NOW Tanyosphaeridium.  Originally Hystrichosphaera (name not validly published), subsequently Hystrichosphaeridium, thirdly Hystrichosphaeridium?, fourthly Baltisphaeridium (Appendix A), fifthly Prolixosphaeridium?, sixthly (and now) Tanyosphaeridium.  Questionable asignment: Davey et al. (1969, p.17).  Taxonomic junior synonym: Hystrichosphaeridium (as Tanyosphaeridium) magdalium, according to Stover and Evitt (1978, p.85).  This combination was not validly published in Davey et al. (1966, p.173), since these authors did not fully reference the basionym.  Age: Late Cretaceous (?Maastrichtian, according to Sarjeant, 1985b, p.143).

Parent: Prolixosphaeridium