Baltisphaeridium xanthiopyxides Appendix A

"xanthiopyxides" (Wetzel, 1933b, p.44-45, pl.4, fig.25 ex Deflandre, 1937b, p.77) Downie and Sarjeant, 1965, p.98.  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, fifthly Prolixosphaeridium?, sixthly (and now) Tanyosphaeridium.  Taxonomic junior synonym: Hystrichosphaeridium (as Tanyosphaeridium) magdalium, according to Stover and Evitt (1978, p.85).  This combination was not validly published in Klement (1960, p.59), since that author did not fully reference the basionym.  Age: Late Cretaceous (?Maastrichtian, according to Sarjeant, 1985b, p.143).

Parent: Baltisphaeridium