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Impletosphaeridium placacanthum

"Impletosphaeridium placacanthum" (Deflandre and Cookson, 1955, p.276-277, pl.9, figs.1-3) Morgenroth, 1966a, p.35.

EMENDATION: May, 1980, p.68, as Systematophora placacantha.

TYPE: Holotype: Deflandre and Cookson, 1955, pl.9, figs.1-2.

HISTORY: NOW: Systematophora. Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Impletosphaeridium, fourthly (and now) Systematophora.

SYNONYM(S): Taxonomic junior synonyms: Baltisphaeridium (as Cleistosphaeridium) panniforme, according to Sarjeant (1984b, p.86-87); Systematophora ancyrea, according to Stover and Evitt (1978, p.84) - however, Lentin and Williams (1981, p.272) retained Systematophora ancyrea.

AGE: Miocene.


Infraspecific taxa:


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