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Exochosphaeridium bifidum subsp. involutum

Exochosphaeridium bifidum subsp. involutum (Davey, 1969c, p.29, pl.2, figs.1-3) Lentin and Williams, 1973, p.56.

EMENDATION: Marheinecke, 1992, p.52, as Exochosphaeridium bifidum subsp. involutum.

TYPE: Holotype: Davey, 1969c, pl.2, fig.3.

HISTORY: Originally Exochosphaeridium bifidum var. involutum, subsequently (and now) Exochosphaeridium bifidum subsp. involutum.

AGE: Campanian-Maastrichtian.


Infraspecific taxa:


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