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Exochosphaeridium palmatum
Exochosphaeridium palmatum (Deflandre and Courteville, 1939) Davey et al., 1969
Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Exochosphaeridium, fourthly Exochosphaeridium?.
Tax. jr. synonym of Pervosphaeridium pseudhystrichodinium (Deflandre, 1937) Yun, 1981, according to Yun, 1981.
Stover and Evitt, 1978, considered this to be a provisionally accepted species of Exochosphaeridium.
This combination was not validly published in Davey et al., 1966, since these authors did not fully reference the basionym.
Holotype: Deflandre and Courteville, 1939, pl.3, fig.1
Age: Late Cretaceous
Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Exochosphaeridium, fourthly Exochosphaeridium?.
Tax. jr. synonym of Pervosphaeridium pseudhystrichodinium (Deflandre, 1937) Yun, 1981, according to Yun, 1981.
Stover and Evitt, 1978, considered this to be a provisionally accepted species of Exochosphaeridium.
This combination was not validly published in Davey et al., 1966, since these authors did not fully reference the basionym.
Holotype: Deflandre and Courteville, 1939, pl.3, fig.1
Age: Late Cretaceous