Baltisphaeridium palmatum Appendix A
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"palmatum" (Deflandre and Courteville, 1939, p.101, pl.3, fig.1) Downie and Sarjeant, 1965, p.93. Holotype: Deflandre and Courteville, 1939, pl.3, fig.1. Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Exochosphaeridium, fourthly Exochosphaeridium?. Taxonomic senior synonym: Hystrichosphaeridium (now Pervosphaeridium) pseudhystrichodinium Deflandre, 1937b, according to Yun Hyesu (1981, p.29). This combination was not validly published in Downie and Sarjeant (1963, p.91), since these authors did not fully reference the basionym. Age: Late Cretaceous.
Parent: Baltisphaeridium_Appendix A